Fixed F13 being reported as PrtSc on OS X.

README.md

@@ -210,6 +210,8 @@ See the [GLFW documentation](http://www.glfw.org/docs/latest/).
 
  - [Cocoa] Bugfix: The `GLFW_KEY_GRAVE_ACCENT` and `GLFW_KEY_WORLD_1` keys had
                    been flipped
+ - [Cocoa] Bugfix: The `GLFW_KEY_F13` key was reported as
+                   `GLFW_KEY_PRINT_SCREEN`
 
 
 ## Contact

src/cocoa_window.m

@@ -359,7 +359,7 @@ static int translateKey(unsigned int key)
         /* 66 */ GLFW_KEY_UNKNOWN,
         /* 67 */ GLFW_KEY_F11,
         /* 68 */ GLFW_KEY_UNKNOWN,
-        /* 69 */ GLFW_KEY_PRINT_SCREEN,
+        /* 69 */ GLFW_KEY_F13,
         /* 6a */ GLFW_KEY_F16,
         /* 6b */ GLFW_KEY_F14,
         /* 6c */ GLFW_KEY_UNKNOWN,