Scripts/Obsidian Sanctum Add support for when encounter is in progress. thnx to kiper

--HG--
branch : trunk

src/server/scripts/Northrend/ObsidianSanctum/instance_obsidian_sanctum.cpp

@@ -62,6 +62,15 @@ public:
             m_bVesperonKilled = false;
         }
 
+        bool IsEncounterInProgress() const
+        {
+            for (uint8 i = 0; i < MAX_ENCOUNTER; ++i)
+                if (m_auiEncounter[i] == IN_PROGRESS)
+                    return true;
+
+            return false;
+        }
+
         void OnCreatureCreate(Creature* creature)
         {
             switch(creature->GetEntry())