(Gresham, OR)  --  Police say a car driven by an 82-year-old man crashed into two houses in Gresham, but no one was injured.  Authorities say the crashes did cause extensive damage at the homes in the four-thousand block of Southwest Fifth Street, shortly before 6:00 p.m. yesterday.  The man told police he hit the gas pedal instead of the brake as he headed south on Nancy Drive toward Fifth.