Core/Vehicle: Add an extra check for required energy before setting power.

src/server/game/Entities/Vehicle/Vehicle.cpp

@@ -102,7 +102,7 @@ void Vehicle::Install()
                     if (!spellInfo)
                         continue;
 
-                    if (spellInfo->PowerType == POWER_ENERGY)
+                    if (spellInfo->PowerType == POWER_ENERGY && spellInfo->CalcPowerCost(_me, spellInfo->GetSchoolMask()) > 0)
                     {
                         _me->setPowerType(POWER_ENERGY);
                         _me->SetMaxPower(POWER_ENERGY, 100);