[svn r330] Implemented synchronized statements. Changed the tryfinally handlers to a more generalized EnclosingHandler. Changed ClassInfoS to be mutable so they can be used as locks. Added new BB after throw ala return/break etc.

module multiarr2;

void main()
{
    static float[1][2][3] arr;
    assert(arr[2][1][0] !<>= float.nan);
}