Core/Unit: Correct speed calculus when affected by SPELL_AURA_MOD_MINIMUM_SPEED (#18136)

src/server/game/Entities/Unit/Unit.cpp

@@ -10996,7 +10996,11 @@ void Unit::UpdateSpeed(UnitMoveType mtype)
 
     if (float minSpeedMod = (float)GetMaxPositiveAuraModifier(SPELL_AURA_MOD_MINIMUM_SPEED))
     {
-        float min_speed = minSpeedMod / 100.0f;
+        float baseMinSpeed = 1.0f;
+        if (!GetOwnerGUID().IsPlayer() && !IsHunterPet() && GetTypeId() == TYPEID_UNIT)
+            baseMinSpeed = ToCreature()->GetCreatureTemplate()->speed_run;
+
+        float min_speed = CalculatePct(baseMinSpeed, minSpeedMod);
         if (speed < min_speed)
             speed = min_speed;
     }