fix potential seg fault (bug #3519)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4982 65c4cc65-6c06-0410-ace0-fbb531ad65f3
21 years ago · b2ab9ffaec
parent 2e88a61fa3
commit b2ab9ffaec
1 changed files with 1 additions and 1 deletions
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@ -3670,7 +3670,7 @@ static void initreqprep(struct sip_request *req, struct sip_pvt *p, char *cmd, c
 		ast_callerid_parse(cid, &n, &l);
 		if (l) 
 			ast_shrink_phone_number(l);
-		if ((!l || !ast_isphonenumber(l)) && default_callerid[0])
+		if (!l || (ast_isphonenumber(l) && default_callerid[0]))
 				l = default_callerid;
 	}
 	/* if user want's his callerid restricted */