*Fix drain mana, judgement of widsom and viper sting damage amount. Patch by Maxxie.

*Add one more rank of Devour Magic.

--HG--
branch : trunk

src/game/SpellAuras.cpp

@@ -5682,6 +5682,17 @@ void Aura::PeriodicTick()
 
             int32 drain_amount = m_target->GetPower(power) > pdamage ? pdamage : m_target->GetPower(power);
 
+            //Viper sting and Drain Life take mana % amount from target, but not bigger than amount*2 of caster mana
+            if ((m_spellProto->SpellFamilyName==SPELLFAMILY_WARLOCK && m_spellProto->SpellFamilyFlags[0]&0x10)
+                || (m_spellProto->SpellFamilyName==SPELLFAMILY_HUNTER && m_spellProto->SpellFamilyFlags[1]&0x80))
+            {
+               uint32 drain = m_target->GetMaxPower(power) * drain_amount /100;
+               if(drain > pCaster->GetMaxPower(power) * drain_amount / 50)
+                  drain_amount = pCaster->GetMaxPower(power) * drain_amount / 50;
+               else
+                  drain_amount = drain;
+            }
+
             // resilience reduce mana draining effect at spell crit damage reduction (added in 2.4)
             if (power == POWER_MANA && m_target->GetTypeId() == TYPEID_PLAYER)
                 drain_amount -= ((Player*)m_target)->GetSpellCritDamageReduction(drain_amount);

src/game/SpellEffects.cpp

@@ -2440,16 +2440,15 @@ void Spell::EffectPowerBurn(uint32 i)
 
     int32 curPower = int32(unitTarget->GetPower(powertype));
 
-
     uint32 power = damage;
-    // Priest's Mana Burn, burn max amount of 26% of caster's mana
+    //Mana burn take mana % amount from target, but not bigger than amount*2 of caster mana
     if ( m_spellInfo->SpellFamilyName==SPELLFAMILY_PRIEST && m_spellInfo->SpellFamilyFlags[0] & 0x10)
     {
         // Burn percentage of target's mana
         power = damage * curPower / 100;
         if (caster)
         {
-            casterPower = caster->GetPower(powertype)*0.26f
+            uint32 casterPower = damage * caster->GetPower(powertype) / 50;
             if (casterPower<curPower)
                 curPower = casterPower;
         }
@@ -3494,6 +3493,7 @@ void Spell::EffectDispel(uint32 i)
                     case 19736: heal_spell = 19735; break;
                     case 27276: heal_spell = 27278; break;
                     case 27277: heal_spell = 27279; break;
+                    case 48011: heal_spell = 48010; break;
                     default:
                         sLog.outDebug("Spell for Devour Magic %d not handled in Spell::EffectDispel", m_spellInfo->Id);
                         break;

src/game/Unit.cpp

@@ -5765,7 +5765,10 @@ bool Unit::HandleDummyAuraProc(Unit *pVictim, uint32 damage, Aura* triggeredByAu
                 case 20186:
                 {
                     if (pVictim->getPowerType() == POWER_MANA)
-                        pVictim->CastSpell(pVictim, 20268, true, 0, triggeredByAura);
+                    {
+                        int32 gainMana = pVictim->GetCreateMana() * triggeredByAura->GetBasePoints() / 100;
+                        pVictim->CastCustomSpell(pVictim, 20268, &gainMana, 0, 0, true, 0, triggeredByAura);
+                    }
                     return true;
                 }
                 // Holy Power (Redemption Armor set)