Added error setting for more cases of invalid tokens.

src/enable.c

@@ -152,6 +152,7 @@ GLFWAPI void glfwEnable(GLFWwindow window, int token)
             enableKeyRepeat(window);
             break;
         default:
+            _glfwSetError(GLFW_INVALID_ENUM, NULL);
             break;
     }
 }
@@ -184,6 +185,7 @@ GLFWAPI void glfwDisable(GLFWwindow window, int token)
             disableKeyRepeat(window);
             break;
         default:
+            _glfwSetError(GLFW_INVALID_ENUM, NULL);
             break;
     }
 }

src/input.c

@@ -53,7 +53,7 @@ GLFWAPI int glfwGetKey(GLFWwindow handle, int key)
     if (key < 0 || key > GLFW_KEY_LAST)
     {
         // TODO: Decide whether key is a value or enum
-        _glfwSetError(GLFW_INVALID_VALUE,
+        _glfwSetError(GLFW_INVALID_ENUM,
                       "glfwGetKey: The specified key is invalid");
         return GLFW_RELEASE;
     }

src/window.c

@@ -468,6 +468,7 @@ GLFWAPI void glfwOpenWindowHint(int target, int hint)
             _glfwLibrary.hints.glRobustness = hint;
             break;
         default:
+            _glfwSetError(GLFW_INVALID_ENUM, NULL);
             break;
     }
 }
@@ -748,12 +749,10 @@ GLFWAPI int glfwGetWindowParam(GLFWwindow handle, int param)
             return window->glProfile;
         case GLFW_OPENGL_ROBUSTNESS:
             return window->glRobustness;
-        default:
-            _glfwSetError(GLFW_INVALID_ENUM,
-                          "glfwGetWindowParam: Invalid enum value for 'param' "
-                          "parameter");
-            return 0;
     }
+
+    _glfwSetError(GLFW_INVALID_ENUM, NULL);
+    return 0;
 }