Do not overwrite ANI if it's set by IE (sendany=yes in the peer)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@13634 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -4860,7 +4860,8 @@ static int check_access(int callno, struct sockaddr_in *sin, struct iax_ies *ies
 				ast_copy_string(iaxs[callno]->cid_name, user->cid_name, sizeof(iaxs[callno]->cid_name));
 				iaxs[callno]->calling_pres = AST_PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN;
 			}
-			ast_copy_string(iaxs[callno]->ani, user->cid_num, sizeof(iaxs[callno]->ani));
+			if (ast_strlen_zero(iaxs[callno]->ani))
+				ast_copy_string(iaxs[callno]->ani, user->cid_num, sizeof(iaxs[callno]->ani));
 		} else {
 			iaxs[callno]->calling_pres = AST_PRES_NUMBER_NOT_AVAILABLE;
 		}