He's sold.  A young lad, wearing a firefighter's helmet, was entering his West New York apartment building with his mom when he saw a fire truck out front.  Members of North Hudson Rescue 1 has just completed a rescue-assist call in the building.  Captain Tom Van Leuven, left, and Firefighter Steve Alvarez invited the youngster to examine the fire truck. The boy and his mother had big smiles on their faces as mom took photos of her happy young fire buff.