Update PetAI.cpp

Pulled check for IsReady to outside of the IsPositive check

(cherry picked from commit a71ea54a3a6f960463fb582b2e573a672ed00999)

src/server/game/AI/CoreAI/PetAI.cpp

@@ -150,14 +150,14 @@ void PetAI::UpdateAI(uint32 diff)
             if (me->GetCharmInfo() && me->GetSpellHistory()->HasGlobalCooldown(spellInfo))
                 continue;
 
+            // check spell cooldown
+            if (!me->GetSpellHistory()->IsReady(spellInfo))
+                continue;
+
             if (spellInfo->IsPositive())
             {
                 if (spellInfo->CanBeUsedInCombat())
                 {
-                    // check spell cooldown & school lock
-                    if (!me->GetSpellHistory()->IsReady(spellInfo))
-                        continue;
-
                     // Check if we're in combat or commanded to attack
                     if (!me->IsInCombat() && !me->GetCharmInfo()->IsCommandAttack())
                         continue;