Cleanup glFlushMappedBufferRange/glFlushMappedBufferRangeAPPLE
Cleanup glFlushMappedBufferRange/glFlushMappedBufferRangeAPPLE

Rely on GL_BUFFER_MAP_POINTER instead, as it is more reliable in face of recursive mappings.

schulmar/apitrace,trtt/apitrace,trtt/apitrace,PeterLValve/apitrace,surround-io/apitrace,schulmar/apitrace,tuanthng/apitrace,tuanthng/apitrace,swq0553/apitrace,trtt/apitrace,surround-io/apitrace,swq0553/apitrace,EoD/apitrace,PeterLValve/apitrace,joshua5201/apitrace,EoD/apitrace,apitrace/apitrace,surround-io/apitrace,surround-io/apitrace,PeterLValve/apitrace,tuanthng/apitrace,joshua5201/apitrace,apitrace/apitrace,trtt/apitrace,tuanthng/apitrace,swq0553/apitrace,schulmar/apitrace,joshua5201/apitrace,PeterLValve/apitrace,trtt/apitrace,EoD/apitrace,swq0553/apitrace,swq0553/apitrace,joshua5201/apitrace,schulmar/apitrace,apitrace/apitrace,surround-io/apitrace,apitrace/apitrace,tuanthng/apitrace,EoD/apitrace,EoD/apitrace,schulmar/apitrace,joshua5201/apitrace