v2.2.0: added some null safety checks to quest music playback

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Elemental.java

@@ -390,8 +390,10 @@ public abstract class Elemental extends Mob {
 						Music.INSTANCE.fadeOut(1f, new Callback() {
 							@Override
 							public void call() {
+								if (Dungeon.level != null) {
 									Dungeon.level.playLevelMusic();
 								}
+							}
 						});
 					}
 				});

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/npcs/Ghost.java

@@ -194,8 +194,10 @@ public class Ghost extends NPC {
 								Music.INSTANCE.fadeOut(1f, new Callback() {
 									@Override
 									public void call() {
+										if (Dungeon.level != null) {
 											Dungeon.level.playLevelMusic();
 										}
+									}
 								});
 							}
 						} );
@@ -367,8 +369,10 @@ public class Ghost extends NPC {
 						Music.INSTANCE.fadeOut(1f, new Callback() {
 							@Override
 							public void call() {
+								if (Dungeon.level != null) {
 									Dungeon.level.playLevelMusic();
 								}
+							}
 						});
 					}
 				});

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/npcs/Wandmaker.java

@@ -358,7 +358,8 @@ public class Wandmaker extends NPC {
 		//quest is active if:
 		public static boolean active(){
 			//it is not completed
-			if (wand1 == null || wand2 == null || !(Dungeon.level instanceof RegularLevel)){
+			if (wand1 == null || wand2 == null
+					|| !(Dungeon.level instanceof RegularLevel) || Dungeon.hero == null){
 				return false;
 			}
 

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/quest/CorpseDust.java

@@ -150,12 +150,13 @@ public class CorpseDust extends Item {
 			Game.runOnRenderThread(new Callback() {
 				@Override
 				public void call() {
-					//maybe have a fade here?
 					Music.INSTANCE.fadeOut(1f, new Callback() {
 						@Override
 						public void call() {
+							if (Dungeon.level != null) {
 								Dungeon.level.playLevelMusic();
 							}
+						}
 					});
 				}
 			});

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/PrisonLevel.java

@@ -157,8 +157,10 @@ public class PrisonLevel extends RegularLevel {
 						Music.INSTANCE.fadeOut(1f, new Callback() {
 							@Override
 							public void call() {
+								if (Dungeon.level != null) {
 									Dungeon.level.playLevelMusic();
 								}
+							}
 						});
 					}
 				});