HARTFORD —— The drive to decriminalize small amounts of marijuana appears to be coming up short in the legislature this year. Senate Majority Leader Martin Looney, D-New Haven, conceded Friday that a bill to soften the penalty for possession of a half-ounce of pot or less does not currently have enough support in the chamber. "We did have a caucus last week and we were somewhat short of the number to pass it with purely Democratic votes,'' Looney said. "We may circle back around to that issue again.''