swap buffers in draw handler instead

include/Mw/LowLevel.h

@@ -35,6 +35,7 @@ struct _MwLLCommon {
 	int   copy_buffer;
 	int   type;
 	int   success;
+	int   do_redraw;
 
 	MwLLHandler handler;
 };

include/Mw/LowLevel/Wayland.h

@@ -82,6 +82,7 @@ struct _MwLLWayland {
 	MwBool configured;
 	MwBool force_redraw;
 	MwBool egl_setup;
+	MwBool drawn_once;
 	MwBool egl_do_resetup;
 	MwU32  x, y, ww, wh;
 	int    z_index;