When inregulary exiting a level by warp cheat, set canvas to NULL so cockpit canvas will not apply furthermore

CHANGELOG.txt

@@ -3,6 +3,7 @@ D2X-Rebirth Changelog
 20100624
 --------
 arch/ogl/gr.c, arch/sdl/gr.c, include/gr.h, main/menu.c: Added function to list valid resolutions and build resolutions menu dynamically with the resulting list
+main/gamecntl.c: When inregulary exiting a level by warp cheat, set canvas to NULL so cockpit canvas will not apply furthermore
 
 20100623
 --------

main/gamecntl.c

@@ -1723,6 +1723,7 @@ void FinalCheats(int key)
 		if (item != -1) {
 			new_level_num = atoi(m.text);
 			if (new_level_num!=0 && new_level_num>=0 && new_level_num<=Last_level) {
+				gr_set_current_canvas(NULL); // get out of cockpit canvas
 				StartNewLevel(new_level_num, 0);
 				do_cheat_penalty();
 			}