Security deposit forfeited?

[Axel Scaggs]

I signed a one year lease and moved out one month early. I asked the landlord if it would be OK and he said it was fine. I found him tenants with good credit before the end of the month. Steam cleaned the carpets, etc, and he determined there was no damage. New tenants moved in 8 days before the month I paid was up and signed a new year lease with a new deposit. I requested via certified mail that my security deposit be returned, but he said that it was forfeited due to a clause in the lease that said it was forfeited if any provision of the lease was violated, in this case not staying the final month. He sent me a letter stating the forfeiture for that reason as well and did not list any damage. He had no losses and lead me to believe I would get my deposit back initially. Should I take this to small claims court? I live in Texas.