*small tweaks to Utgarde keep bosses

--HG--
branch : trunk

src/scripts/northrend/utgarde_keep/utgarde_keep/boss_ingvar_the_plunderer.cpp

@@ -335,6 +335,7 @@ struct mob_annhylde_the_callerAI : public ScriptedAI
                 Resurect_Phase = 1;
                 break;
             case 2:
+                m_creature->SetVisibility(VISIBILITY_OFF);
                 m_creature->DealDamage(m_creature,m_creature->GetHealth());
                 m_creature->RemoveCorpse();
                 break;

src/scripts/northrend/utgarde_keep/utgarde_keep/boss_skarvald_dalronn.cpp

@@ -341,7 +341,7 @@ struct boss_dalronn_the_controllerAI : public ScriptedAI
             if (!m_creature->IsNonMeleeSpellCasted(false))
             {
                 DoCast(SelectUnit(SELECT_TARGET_RANDOM, 0), DUNGEON_MODE(SPELL_SHADOW_BOLT, H_SPELL_SHADOW_BOLT));
-                ShadowBolt_Timer = 1000;
+                ShadowBolt_Timer = 2100;//give a 100ms pause to try cast other spells
             }
         } else ShadowBolt_Timer -= diff;
 
@@ -356,9 +356,12 @@ struct boss_dalronn_the_controllerAI : public ScriptedAI
 
         if (IsHeroic())
             if (Summon_Timer <= diff)
+            {
+                if (!m_creature->IsNonMeleeSpellCasted(false))
                 {
                     DoCast(m_creature, H_SPELL_SUMMON_SKELETONS);
                     Summon_Timer = (rand()%10000) + 20000;
+                }
             } else Summon_Timer -= diff;
 
         DoMeleeAttackIfReady();