fix mem leak in free_value (bug #2990)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4398 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/ast_expr.y b/ast_expr.y
index 97b2b02..71546f1 100755 (executable)
--- a/ast_expr.y
+++ b/ast_expr.y
@@ -215,6 +215,8 @@ struct val *vp;
        }
        if (vp->type == string || vp->type == numeric_string)
                free (vp->u.s); 
+       if (vp)
+               free (vp);
 }