add initContext as a window resize callback.  this at least fixes resize problems on mac and perhaps elsewhere when hitting f1, dragging window corner, etc.
add initContext as a window resize callback.  this at least fixes resize problems on mac and perhaps elsewhere when hitting f1, dragging window corner, etc.


kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1