prune-packed: only show progress when stderr is a tty

diff --git a/builtin-add.c b/builtin-add.c
index a5714735e6ef70f92f56a4cca67c7b78e3ef255a..cb6e5906fb76f2460f212c54b557e5ae0ce23579 100644 (file)
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -198,7 +198,7 @@ static int edit_patch(int argc, const char **argv, const char *prefix)
        out = open(file, O_CREAT | O_WRONLY, 0644);
        if (out < 0)
                die ("Could not open '%s' for writing.", file);
-       rev.diffopt.file = fdopen(out, "w");
+       rev.diffopt.file = xfdopen(out, "w");
        rev.diffopt.close_file = 1;
        if (run_diff_files(&rev, 0))
                die ("Could not write patch");