Fix InstanceData::DoCompleteAchievement (and crash in AchievementMgr::CompletedAchievement).

Remove support of no longer existing achievement "The Party is Over". Thanks JuliuSZS.
Fixes issue #1318.

--HG--
branch : trunk

src/game/InstanceData.cpp

@@ -313,13 +313,19 @@ void InstanceData::DoSendNotifyToInstance(const char *format, ...)
 // Complete Achievement for all players in instance
 void InstanceData::DoCompleteAchievement(uint32 achievement)
 {
-    AchievementEntry const* AE = GetAchievementStore()->LookupEntry(achievement);
+    AchievementEntry const* pAE = GetAchievementStore()->LookupEntry(achievement);
     Map::PlayerList const &PlayerList = instance->GetPlayers();
 
+    if (!pAE)
+    {
+        error_log("TSCR: DoCompleteAchievement called for not existing achievement %u", achievement);
+        return;
+    }
+
     if (!PlayerList.isEmpty())
         for (Map::PlayerList::const_iterator i = PlayerList.begin(); i != PlayerList.end(); ++i)
             if (Player *pPlayer = i->getSource())
-                pPlayer->CompletedAchievement(AE);
+                pPlayer->CompletedAchievement(pAE);
 }
 
 // Update Achievement Criteria for all players in instance

src/scripts/northrend/azjol_nerub/ahnkahet/boss_prince_taldaram.cpp

@@ -47,10 +47,7 @@ enum Misc
 };
 #define DATA_SPHERE_ANGLE_OFFSET            0.7
 #define DATA_GROUND_POSITION_Z             11.4
-enum Achievements
-{
-    ACHIEV_THE_PARTY_IS_OVER                      = 1861
-};
+
 enum Yells
 {
     SAY_AGGRO                                     = -1619021,
@@ -262,16 +259,7 @@ struct boss_taldaramAI : public ScriptedAI
         DoScriptText(SAY_DEATH, m_creature);
 
         if (pInstance)
-        {
             pInstance->SetData(DATA_PRINCE_TALDARAM_EVENT, DONE);
-
-            if (IsHeroic())
-            {
-                Map::PlayerList const &players = pInstance->instance->GetPlayers();
-                if (players.getSize() < 5)
-                    pInstance->DoCompleteAchievement(ACHIEV_THE_PARTY_IS_OVER);
-            }
-        }
     }
 
     void KilledUnit(Unit *victim)