Reset subtype in MgCmdDrawLine::initialize.
Reset subtype in MgCmdDrawLine::initialize.

aw691190716/vgcore,aw691190716/vgcore,aw691190716/vgcore,xuebao555/vgcore,xuebao555/vgcore,aw691190716/vgcore,xuebao555/vgcore,xuebao555/vgcore