Use the last CDR entry instead of the first CDR entry for variable retrieving variables using the CDR dialplan function. (issue #7689 reported by voipgate)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@40225 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_cdr.c

@@ -44,11 +44,12 @@ static char *builtin_function_cdr_read(struct ast_channel *chan, char *cmd, char
 	int argc;
 	char *argv[2];
 	int recursive = 0;
+	struct ast_cdr *cdr = chan->cdr;
 
 	if (ast_strlen_zero(data))
 		return NULL;
 	
-	if (!chan->cdr)
+	if (!cdr)
 		return NULL;
 
 	mydata = ast_strdupa(data);
@@ -61,7 +62,11 @@ static char *builtin_function_cdr_read(struct ast_channel *chan, char *cmd, char
 			recursive = 1;
 	}
 
-	ast_cdr_getvar(chan->cdr, argv[0], &ret, buf, len, recursive);
+	/* Find last entry */
+	while (cdr->next)
+		cdr = cdr->next;
+
+	ast_cdr_getvar(cdr, argv[0], &ret, buf, len, recursive);
 
 	return ret;
 }