Report invalid constants in the appropriate base

If the expected constants are defined in hexadecimal in the header then
the error string should also use hexadecimal.

Idea by IntellectualKitty.

Related to #970.

src/context.c

@@ -45,7 +45,7 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
         ctxconfig->source != GLFW_OSMESA_CONTEXT_API)
     {
         _glfwInputError(GLFW_INVALID_ENUM,
-                        "Invalid context creation API %i",
+                        "Invalid context creation API 0x%08X",
                         ctxconfig->source);
         return GLFW_FALSE;
     }
@@ -55,7 +55,7 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
         ctxconfig->client != GLFW_OPENGL_ES_API)
     {
         _glfwInputError(GLFW_INVALID_ENUM,
-                        "Invalid client API %i",
+                        "Invalid client API 0x%08X",
                         ctxconfig->client);
         return GLFW_FALSE;
     }
@@ -85,7 +85,7 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
                 ctxconfig->profile != GLFW_OPENGL_COMPAT_PROFILE)
             {
                 _glfwInputError(GLFW_INVALID_ENUM,
-                                "Invalid OpenGL profile %i",
+                                "Invalid OpenGL profile 0x%08X",
                                 ctxconfig->profile);
                 return GLFW_FALSE;
             }
@@ -134,7 +134,7 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
             ctxconfig->robustness != GLFW_LOSE_CONTEXT_ON_RESET)
         {
             _glfwInputError(GLFW_INVALID_ENUM,
-                            "Invalid context robustness mode %i",
+                            "Invalid context robustness mode 0x%08X",
                             ctxconfig->robustness);
             return GLFW_FALSE;
         }
@@ -146,7 +146,7 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
             ctxconfig->release != GLFW_RELEASE_BEHAVIOR_FLUSH)
         {
             _glfwInputError(GLFW_INVALID_ENUM,
-                            "Invalid context release behavior %i",
+                            "Invalid context release behavior 0x%08X",
                             ctxconfig->release);
             return GLFW_FALSE;
         }

src/init.c

@@ -238,7 +238,7 @@ GLFWAPI void glfwInitHint(int hint, int value)
             return;
     }
 
-    _glfwInputError(GLFW_INVALID_ENUM, "Invalid init hint %i", hint);
+    _glfwInputError(GLFW_INVALID_ENUM, "Invalid init hint 0x%08X", hint);
 }
 
 GLFWAPI void glfwGetVersion(int* major, int* minor, int* rev)

src/input.c

@@ -225,7 +225,7 @@ GLFWAPI int glfwGetInputMode(GLFWwindow* handle, int mode)
         case GLFW_STICKY_MOUSE_BUTTONS:
             return window->stickyMouseButtons;
         default:
-            _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode %i", mode);
+            _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode 0x%08X", mode);
             return 0;
     }
 }
@@ -246,7 +246,7 @@ GLFWAPI void glfwSetInputMode(GLFWwindow* handle, int mode, int value)
                 value != GLFW_CURSOR_DISABLED)
             {
                 _glfwInputError(GLFW_INVALID_ENUM,
-                                "Invalid cursor mode %i",
+                                "Invalid cursor mode 0x%08X",
                                 value);
                 return;
             }
@@ -309,7 +309,7 @@ GLFWAPI void glfwSetInputMode(GLFWwindow* handle, int mode, int value)
         }
     }
 
-    _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode %i", mode);
+    _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode 0x%08X", mode);
 }
 
 GLFWAPI const char* glfwGetKeyName(int key, int scancode)
@@ -466,7 +466,7 @@ GLFWAPI GLFWcursor* glfwCreateStandardCursor(int shape)
         shape != GLFW_HRESIZE_CURSOR &&
         shape != GLFW_VRESIZE_CURSOR)
     {
-        _glfwInputError(GLFW_INVALID_ENUM, "Invalid standard cursor %i", shape);
+        _glfwInputError(GLFW_INVALID_ENUM, "Invalid standard cursor 0x%08X", shape);
         return NULL;
     }
 

src/window.c

@@ -388,7 +388,7 @@ GLFWAPI void glfwWindowHint(int hint, int value)
             _glfw.hints.refreshRate = value;
             break;
         default:
-            _glfwInputError(GLFW_INVALID_ENUM, "Invalid window hint %i", hint);
+            _glfwInputError(GLFW_INVALID_ENUM, "Invalid window hint 0x%08X", hint);
             break;
     }
 }
@@ -757,7 +757,7 @@ GLFWAPI int glfwGetWindowAttrib(GLFWwindow* handle, int attrib)
             return window->context.noerror;
     }
 
-    _glfwInputError(GLFW_INVALID_ENUM, "Invalid window attribute %i", attrib);
+    _glfwInputError(GLFW_INVALID_ENUM, "Invalid window attribute 0x%08X", attrib);
     return 0;
 }
 
@@ -804,7 +804,7 @@ GLFWAPI void glfwSetWindowAttrib(GLFWwindow* handle, int attrib, int value)
             return;
     }
 
-    _glfwInputError(GLFW_INVALID_ENUM, "Invalid window attribute %i", attrib);
+    _glfwInputError(GLFW_INVALID_ENUM, "Invalid window attribute 0x%08X", attrib);
 }
 
 GLFWAPI GLFWmonitor* glfwGetWindowMonitor(GLFWwindow* handle)