*Add script sql for nexus. By PSZ

*Thanks to onkelz28 for preparing the patch

--HG--
branch : trunk

src/bindings/scripts/scripts/zone/nexus/nexus/boss_anomalus.cpp

@@ -58,7 +58,7 @@ struct TRINITY_DLL_DECL boss_anomalusAI : public ScriptedAI
 {
     boss_anomalusAI(Creature *c) : ScriptedAI(c)
 	{
-        pInstance = ((ScriptedInstance*)c->GetInstanceData());
+        pInstance = c->GetInstanceData();
         Reset();
         HeroicMode = c->GetMap()->IsHeroic();
 	}
@@ -196,7 +196,7 @@ struct TRINITY_DLL_DECL mob_chaotic_riftAI : public Scripted_NoMovementAI
 {
     mob_chaotic_riftAI(Creature *c) : Scripted_NoMovementAI(c)
 	{
-        pInstance = ((ScriptedInstance*)c->GetInstanceData());
+        pInstance = c->GetInstanceData();
         Reset();
 	}
 

src/bindings/scripts/scripts/zone/nexus/nexus/boss_keristrasza.cpp

@@ -45,7 +45,7 @@ struct TRINITY_DLL_DECL boss_keristraszaAI : public ScriptedAI
 {
     boss_keristraszaAI(Creature *c) : ScriptedAI(c)
     {
-        pInstance = ((ScriptedInstance*)c->GetInstanceData());
+        pInstance = c->GetInstanceData();
 		HeroicMode = m_creature->GetMap()->IsHeroic();
         Reset();
     }

src/bindings/scripts/scripts/zone/nexus/nexus/boss_magus_telestra.cpp

@@ -60,7 +60,7 @@ struct TRINITY_DLL_DECL boss_magus_telestraAI : public ScriptedAI
 {
     boss_magus_telestraAI(Creature* c) : ScriptedAI(c) 
     {
-        pInstance = ((ScriptedInstance*)c->GetInstanceData());
+        pInstance = c->GetInstanceData();
         Reset();
         HeroicMode = c->GetMap()->IsHeroic();
 	}

src/bindings/scripts/scripts/zone/nexus/nexus/boss_ormorok.cpp

@@ -54,7 +54,7 @@ struct TRINITY_DLL_DECL boss_ormorokAI : public ScriptedAI
 {
     boss_ormorokAI(Creature *c) : ScriptedAI(c) 
 	{
-        pInstance = ((ScriptedInstance*)c->GetInstanceData());
+        pInstance = c->GetInstanceData();
         Reset();
 		HeroicMode = c->GetMap()->IsHeroic();
     }

src/bindings/scripts/scripts/zone/nexus/nexus/instance_nexus.cpp

@@ -148,7 +148,7 @@ struct TRINITY_DLL_DECL instance_nexus : public ScriptedInstance
 
     std::string GetSaveData()
     {
-        return strInstData.c_str();
+        return strInstData;
     }
 
     void Load(const char* chrIn)