Use GL direct updates when possible

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402434

src/video/bwindow/SDL_BWin.h

@@ -113,6 +113,7 @@ public:
 				SDL_GLView = new BGLView(Bounds(), "SDL GLView",
 					 	B_FOLLOW_ALL_SIDES, (B_WILL_DRAW|B_FRAME_EVENTS),
 					 	gl_flags);
+				SDL_GLView->EnableDirectMode(true);
 			}
 			if ( the_view != SDL_GLView ) {
 				if ( the_view ) {