v2.5.1: fixed rare crashes when censor had no cells to spawn gas in

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/trinkets/ChaoticCenser.java

@@ -139,12 +139,13 @@ public class ChaoticCenser extends Trinket {
 				}
 
 				if (Random.Float() < triggerChance){
-					produceGas();
+					if (produceGas()) {
 						Sample.INSTANCE.play(Assets.Sounds.GAS);
 						Dungeon.hero.interrupt();
 						left += Random.IntRange((int) (avgTurns * 0.9f), (int) (avgTurns * 1.1f));
 					}
 				}
+			}
 
 			//buff ticks an average of every 5 turns
 			int delay = Random.NormalIntRange(2, 8);
@@ -175,11 +176,11 @@ public class ChaoticCenser extends Trinket {
 		}
 	}
 
-	private static void produceGas(){
+	private static boolean produceGas(){
 		int level = trinketLevel(ChaoticCenser.class);
 
 		if (level < 0 || level > 3){
-			return;
+			return false;
 		}
 
 		Class<?extends Blob> gasToSpawn;
@@ -235,10 +236,15 @@ public class ChaoticCenser extends Trinket {
 		}
 
 		if (!candidateCells.isEmpty()) {
-			int targetCell = Random.chances(candidateCells);
+			Integer targetCell = Random.chances(candidateCells);
+			if (targetCell != null) {
 				GameScene.add(Blob.seed(targetCell, (int) gasQuantity, gasToSpawn));
 				MagicMissile.boltFromChar(Dungeon.hero.sprite.parent, MISSILE_VFX.get(gasToSpawn), Dungeon.hero.sprite, targetCell, null);
+				return true;
 			}
+		}
+
+		return false;
 
 	}