Eliminate repetition of fullcontact during reconstruction.

If the fullcontact field appears in both the sippeers and the
sipregs table, then during reconstruction of the field, it will
otherwise be doubled.
(closes issue #14754)
 Reported by: Alexei Gradinari
 Patches: 
       20090506__bug14754.diff.txt uploaded by tilghman (license 14)
 Tested by: lmadsen


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@192932 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -17421,6 +17421,7 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
 	struct ast_variable *tmpvar = NULL;
 	struct ast_flags peerflags[2] = {{(0)}};
 	struct ast_flags mask[2] = {{(0)}};
+	int alt_fullcontact = alt ? 1 : 0;
 	char fullcontact[sizeof(peer->fullcontact)] = "";
 
 	if (!realtime || ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS))
@@ -17479,6 +17480,15 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
 		} else if (realtime && !strcasecmp(v->name, "name"))
 			ast_copy_string(peer->name, v->value, sizeof(peer->name));
 		else if (realtime && !strcasecmp(v->name, "fullcontact")) {
+			if (alt_fullcontact && !alt) {
+				/* Reset, because the alternate also has a fullcontact and we
+				 * do NOT want the field value to be doubled. It might be
+				 * tempting to skip this, but the first table might not have
+				 * fullcontact and since we're here, we know that the alternate
+				 * absolutely does. */
+				alt_fullcontact = 0;
+				fullcontact[0] = '\0';
+			}
 			/* Reconstruct field, because realtime separates our value at the ';' */
 			if (!ast_strlen_zero(fullcontact)) {
 				strncat(fullcontact, ";", sizeof(fullcontact) - strlen(fullcontact) - 1);