Fixed mingw compile errors.

src/win32_fullscreen.c

@@ -229,7 +229,7 @@ int  _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, GLFWvidmode* list, int ma
     }
 
     if (list && maxcount)
-        memcpy(list, vidModes, sizeof(GLFWvidmode) * min(vidModesCount, maxcount));
+        memcpy(list, vidModes, sizeof(GLFWvidmode) * ((vidModesCount < maxcount) ? vidModesCount : maxcount));
 
     free(vidModes);
 

src/win32_monitor.c

@@ -38,6 +38,11 @@
 #define EDS_ROTATEDMODE 0x00000004
 #endif
 
+// The MinGW upstream lacks this
+#ifndef DISPLAY_DEVICE_ACTIVE
+#define DISPLAY_DEVICE_ACTIVE 0x00000001
+#endif
+
 
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////

src/win32_platform.h

@@ -47,7 +47,7 @@
 
 #include <windows.h>
 #include <mmsystem.h>
-#include <Dbt.h>
+#include <dbt.h>
 
 // This path may need to be changed if you build GLFW using your own setup
 // We ship and use our own copy of wglext.h since GLFW uses fairly new