A fight between two people erupted in gunfire Tuesday at a Houston-area community college, leaving three people wounded, including a maintenance worker caught in the crossfire.  No one was killed, but the volley of gunshots just after noon on the Lone Star College campus sent students and others scrambling for safety and sparked fear of another campus massacre slightly more than a month after 26 people were killed at an elementary school in Newtown, Connecticut.  Harris County sheriff's officials said late Tuesday that Carlton Berry, 22, had been charged with aggravated assault in the shooting.  Authorities offered no details about what led to the fight. One of the people involved had a student ID.  The conditions of the other person involved in the shooting and maintenance worker were not available.  Police evacuated and closed the campus after the shooting. It reopened in the late afternoon, with classes expected to resume today.