when appending a list of variable to a category, ensure the tail pointer points to the last variable in the list

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@47688 65c4cc65-6c06-0410-ace0-fbb531ad65f3

config.c

@@ -120,6 +120,8 @@ void ast_variable_append(struct ast_category *category, struct ast_variable *var
 	else
 		category->root = variable;
 	category->last = variable;
+	while (category->last->next)
+		category->last = category->last->next;
 }
 
 void ast_variables_destroy(struct ast_variable *v)