glretrace: Fix currentDrawable size book-keeping on WGL.
glretrace: Fix currentDrawable size book-keeping on WGL.

Width/height was being tampered by the window size adjustments.

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