Fixed leak of display name.

README.md

@@ -59,6 +59,7 @@ The following dependencies are needed by the examples and test programs:
                    recorders to fail
  - [Cocoa] Bugfix: Some Core Foundation objects were leaked during joystick
                    enumeration
+ - [Cocoa] Bugfix: One copy of each display name string was leaked
  - [Win32] Enabled generation of pkg-config file for MinGW
  - [Win32] Bugfix: Failure to load winmm or its functions was not reported to
                    the error callback

src/cocoa_monitor.m

@@ -308,6 +308,8 @@ _GLFWmonitor** _glfwPlatformGetMonitors(int* count)
         monitors[found] = _glfwAllocMonitor(name, size.width, size.height);
         monitors[found]->ns.displayID = displays[i];
 
+        free(name);
+
         for (j = 0;  j < [screens count];  j++)
         {
             NSScreen* screen = [screens objectAtIndex:j];