Fix to allow compile under 32 bit.
Fix to allow compile under 32 bit.

khanhtbh/XcodeEditor,cezheng/XcodeEditor,appsquickly/XcodeEditor,JoelGerboreLaser/XcodeEditor,JoelGerboreLaser/XcodeEditor,appsquickly/XcodeEditor,iosdevzone/XcodeEditor,appsquickly/XcodeEditor,andyvand/XcodeEditor,cezheng/XcodeEditor,service2media/XcodeEditor,khanhtbh/XcodeEditor