Mac build fix to the issue caused by my last commit.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5050 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_GCPad/Src/GCPad.cpp

@@ -606,7 +606,7 @@ bool IsKey(int Key)
 	if (MapKey < 256)
 	{
 		Ret = GetAsyncKeyState(MapKey);		// Keyboard (Windows)
-#else
+#elif defined HAVE_X11 && HAVE_X11
 	if (MapKey < 256 || MapKey > 0xf000)
 	{
 		char keys[32];