Added proper monitor comparison.

src/win32_monitor.c

@@ -174,6 +174,11 @@ _GLFWmonitor** _glfwPlatformGetMonitors(int* count)
     return monitors;
 }
 
+GLboolean _glfwPlatformIsSameMonitor(_GLFWmonitor* first, _GLFWmonitor* second)
+{
+    return wcscmp(first->win32.name, second->win32.name);
+}
+
 void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
 {
     DEVMODE settings;