add check to newRtMsg() to avoid undefined sig_userpost
add check to newRtMsg() to avoid undefined sig_userpost

kseistrup/twister-html,xeddmc/twister-html,slr/twister-html,miguelfreitas/twister-html,myleneb/twister-html,slr/twister-html,xeddmc/twister-html,majestrate/twister-html,kseistrup/twister-html,myleneb/twister-html,majestrate/twister-html,miguelfreitas/twister-html