compile fix

(event handler works on linux with gltest and padsimpleenv)


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@1877 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/Timer.h

@@ -19,6 +19,7 @@
 #define _TIMER_H
 
 #include "Common.h"
+#include <string>
 
 namespace Common
 {