Update drawable on variations of glViewport (issue #71)
Update drawable on variations of glViewport (issue #71)

Thanks to Gregory (gregory38) for spotting this.

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