When rtp_keepalive is on for a PJSIP endpoint dialing to another
Asterisk instance also using PJSIP, Asterisk will continue to print
warning messages about not being able to send frames of a certain
type. This suppresses that warning message.
Change-Id: I0332a05519d7bda9cacfa26d433909ff1909be67
break;
case AST_FRAME_MODEM:
break;
+ case AST_FRAME_CNG:
+ break;
default:
ast_log(LOG_WARNING, "Can't send %u type frames with PJSIP\n", frame->frametype);
break;