fix(Core/SAI): rooted check blocks vehicles from casting quest credit (azerothcore#20283)

spell

The quest SteamTank Surprise has a SmartAI entry in the db that causes
the tank to cast the kill credit spell on the player when they
successfully destroy a plague wagon. Currently, this spell cast is being
blocked by the rooted check handler for SMART_ACTION_CAST. The change
proposes that this rooted check should not apply to vehicles.

Closes AzerothCore issue azerothcore#20237

Co-authored-by: cgrahamseven <[email protected]>

Author: cgrahamseven

src/server/game/AI/SmartScripts/SmartScript.cpp

@@ -693,7 +693,7 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
                     bool isSpellIgnoreLOS = spellInfo->HasAttribute(SPELL_ATTR2_IGNORE_LINE_OF_SIGHT);
 
                     // If target is rooted we move out of melee range before casting, but not further than spell max range.
-                    if (isWithinLOSInMap && isWithinMeleeRange && isRangedAttack && isTargetRooted && canCastSpell)
+                    if (isWithinLOSInMap && isWithinMeleeRange && isRangedAttack && isTargetRooted && canCastSpell && !me->IsVehicle())
                     {
                         failedSpellCast = true; // Mark spellcast as failed so we can retry it later
                         float minDistance = std::max(meleeRange, spellMinRange) - distanceToTarget + NOMINAL_MELEE_RANGE;