Remove dependancy on libpri

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@904 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -5601,7 +5601,9 @@ static void *pri_dchannel(void *vpri)
 					} else if (!strlen(pri->pvt[chan]->dop.dialstr)) {
 						zt_enable_ec(pri->pvt[chan]);
 						pri->pvt[chan]->subs[SUB_REAL].needringing =1;
+#ifdef PRI_EVENT_PROCEEDING
 						pri->pvt[chan]->proceeding=1;
+#endif
 					} else
 						ast_log(LOG_DEBUG, "Deferring ringing notification because of extra digits to dial...\n");
 				}