Add Aura::CheckTarget() to check Alterac Valley buff targets.

Merge from old TC-2.4.3 repository, original patch by krz.
Fixes issue #954.

--HG--
branch : trunk

src/game/SpellAuras.cpp

@@ -532,7 +532,7 @@ void Aura::_ApplyEffectForTargets(uint8 effIndex)
     UnitList targetList;
     for (ApplicationMap::iterator appIter = m_applications.begin(); appIter != m_applications.end(); ++appIter)
     {
-        if ((appIter->second->GetEffectsToApply() & (1<<effIndex)) && !appIter->second->HasEffect(effIndex))
+        if ((appIter->second->GetEffectsToApply() & (1<<effIndex)) && CheckTarget(appIter->second->GetTarget()) && !appIter->second->HasEffect(effIndex))
             targetList.push_back(appIter->second->GetTarget());
     }
 
@@ -626,6 +626,45 @@ void Aura::Update(uint32 diff, Unit * caster)
     }
 }
 
+bool Aura::CheckTarget(Unit *target)
+{
+    // some special cases
+    switch(GetId())
+    {
+        case 45828: // AV Marshal's HP/DMG auras
+        case 45829:
+        case 45830:
+        case 45821:
+        case 45822: // AV Warmaster's HP/DMG auras
+        case 45823:
+        case 45824:
+        case 45826:
+            switch(target->GetEntry())
+            {
+                // alliance
+                case 14762: // Dun Baldar North Marshal
+                case 14763: // Dun Baldar South Marshal
+                case 14764: // Icewing Marshal
+                case 14765: // Stonehearth Marshal
+                case 11948: // Vandar Stormspike
+                // horde
+                case 14772: // East Frostwolf Warmaster
+                case 14776: // Tower Point Warmaster
+                case 14773: // Iceblood Warmaster
+                case 14777: // West Frostwolf Warmaster
+                case 11946: // Drek'thar
+                    return true;
+                default:
+                    break;
+            }
+            return false;
+            break;
+        default:
+            break;
+        return true;
+    }
+}
+
 void Aura::SetDuration(int32 duration, bool withMods)
 {
     if (withMods)

src/game/SpellAuras.h

@@ -163,6 +163,7 @@ class Aura
 
         void SetNeedClientUpdateForTargets() const;
         void HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster, bool apply);
+        bool CheckTarget(Unit *target);
     private:
         void _DeleteRemovedApplications();
     protected: