B08018 - vision when breaking closed doors

Do vision_recalc immediately when blasting a door so that all the
subsequent messages for the same blast hitting other things are all
evaluated with the same vision in effect.

src/lock.c

@@ -847,6 +847,8 @@ int x, y;
 		}
 		unblock_point(x,y);
 		newsym(x,y);
+		/* force vision recalc before printing more messages */
+		if (vision_full_recalc) vision_recalc(0);
 		loudness = 20;
 	    } else res = FALSE;
 	    break;