Fix wrong variable in physics collision loop

In Player::updatePos(), when processing physics collision results, the code was incorrectly using col.object instead of colCheck.object when checking if the collision object is a player.

This caused:
- First iteration: col.object is uninitialized (zeroed), leading to null pointer access
- Subsequent iterations: col.object contains the previous iteration's value, causing incorrect type checks

The fix changes col.object to colCheck.object to properly check the current collision object.

Engine/source/T3D/player.cpp

@@ -5169,7 +5169,7 @@ bool Player::updatePos(const F32 travelTime)
             Collision& colCheck = collisionList[i];
             if (colCheck.object)
             {
-               SceneObject* obj = static_cast<SceneObject*>(col.object);
+               SceneObject* obj = static_cast<SceneObject*>(colCheck.object);
                if (obj->getTypeMask() & PlayerObjectType)
                {
                   _handleCollision( colCheck );