v0.9.3: added a safety check to attackindicator

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ui/AttackIndicator.java

@@ -142,13 +142,15 @@ public class AttackIndicator extends Tag {
 			sprite = null;
 		}
 
+		if (lastTarget != null) {
 			sprite = lastTarget.sprite();
 			active = true;
 			sprite.linkVisuals(lastTarget);
 			sprite.idle();
 			sprite.paused = true;
 			sprite.visible = bg.visible;
-		add( sprite );
+			add(sprite);
+		}
 
 		layout();
 	}