Core/Spells: Set energy in cat form to zero on shapeshift before calculating energy gain from furor talent.

Signed-off-by: Machiavelli <machiavelli.trinity@gmail.com>

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -3109,6 +3109,7 @@ void AuraEffect::HandleAuraModShapeshift(AuraApplication const * aurApp, uint8 m
                         case FORM_CAT:
                         {
                             int32 basePoints = int32(std::min(oldPower, FurorChance));
+                            target->SetPower(POWER_ENERGY, 0);
                             target->CastCustomSpell(target, 17099, &basePoints, NULL, NULL, true, NULL, this);
                         }
                         break;