V0.2.0: Corrected some misc. item buff detach logic

src/com/shatteredpixel/shatteredpixeldungeon/items/artifacts/Artifact.java

@@ -105,7 +105,7 @@ public class Artifact extends KindofMisc {
             hero.belongings.misc2 = null;
         }
 
-        hero.remove(passiveBuff);
+        passiveBuff.detach();
         passiveBuff = null;
 
         hero.spendAndNext( TIME_TO_EQUIP );

src/com/shatteredpixel/shatteredpixeldungeon/items/artifacts/CapeOfThorns.java

@@ -118,6 +118,7 @@ public class CapeOfThorns extends Artifact {
         public void detach(){
             timer = 0;
             charge = 0;
+            super.detach();
         }
 
     }