winex11: Create a surface even for OpenGL windows, to allow painting the non-client area.

dlls/winex11.drv/opengl.c

@@ -1114,15 +1114,6 @@ static void release_gl_drawable( struct gl_drawable *gl )
     if (gl) LeaveCriticalSection( &context_section );
 }
 
-BOOL has_gl_drawable( HWND hwnd )
-{
-    struct gl_drawable *gl;
-
-    gl = get_gl_drawable( hwnd, 0 );
-    release_gl_drawable( gl );
-    return gl != NULL;
-}
-
 static GLXContext create_glxcontext(Display *display, struct wgl_context *context, GLXContext shareList)
 {
     GLXContext ctx;
@@ -3081,11 +3072,6 @@ struct opengl_funcs *get_glx_driver( UINT version )
     return NULL;
 }
 
-BOOL has_gl_drawable( HWND hwnd )
-{
-    return FALSE;
-}
-
 void sync_gl_drawable( HWND hwnd, const RECT *visible_rect, const RECT *client_rect )
 {
 }

dlls/winex11.drv/window.c

@@ -2060,7 +2060,6 @@ void CDECL X11DRV_WindowPosChanging( HWND hwnd, HWND insert_after, UINT swp_flag
 
     if (data->embedded) goto done;
     if (data->whole_window == root_window) goto done;
-    if (has_gl_drawable( hwnd )) goto done;
     if (!client_side_graphics && !layered) goto done;
 
     surface_rect = get_surface_rect( visible_rect );

dlls/winex11.drv/x11drv.h

@@ -567,7 +567,6 @@ extern void release_win_data( struct x11drv_win_data *data ) DECLSPEC_HIDDEN;
 extern Window X11DRV_get_whole_window( HWND hwnd ) DECLSPEC_HIDDEN;
 extern XIC X11DRV_get_ic( HWND hwnd ) DECLSPEC_HIDDEN;
 
-extern BOOL has_gl_drawable( HWND hwnd ) DECLSPEC_HIDDEN;
 extern void sync_gl_drawable( HWND hwnd, const RECT *visible_rect, const RECT *client_rect ) DECLSPEC_HIDDEN;
 extern void destroy_gl_drawable( HWND hwnd ) DECLSPEC_HIDDEN;