fix long cast animation predicate (other controllers may still need t…

…o be refactored)

src/main/java/io/redspace/ironsspellbooks/entity/mobs/abstract_spell_casting_mob/AbstractSpellCastingMob.java

@@ -428,7 +428,7 @@ private PlayState instantCastingPredicate(AnimationEvent event) {
     }
 
     private PlayState longCastingPredicate(AnimationEvent event) {
-        if (cancelCastAnimation) {
+        if (cancelCastAnimation || !isCasting()) {
             return PlayState.STOP;
         }