gtk: Fix typos in comment

gtk/gtkmain.c

@@ -1656,7 +1656,7 @@ gtk_main_do_event (GdkEvent *event)
 	{
 	  /* The app may paint with a previously allocated cairo_t,
 	     which will draw directly to the window. We can't catch cairo
-	     drap operatoins to automatically flush the window, thus we
+	     draw operations to automatically flush the window, thus we
 	     need to explicitly flush any outstanding moves or double
 	     buffering */
 	  gdk_window_flush (event->any.window);