Warning fix

(cherry picked from commit 983635458bbe84b359713693da0be2bfdcd55536)

src/server/game/Entities/Unit/Unit.h

@@ -598,7 +598,7 @@ enum DamageEffectType
 };
 
 // Value masks for UNIT_FIELD_FLAGS
-enum UnitFlags
+enum UnitFlags : uint32
 {
     UNIT_FLAG_SERVER_CONTROLLED     = 0x00000001,           // set only when unit movement is controlled by server - by SPLINE/MONSTER_MOVE packets, together with UNIT_FLAG_STUNNED; only set to units controlled by client; client function CGUnit_C::IsClientControlled returns false when set for owner
     UNIT_FLAG_NON_ATTACKABLE        = 0x00000002,           // not attackable