git: quiet down `rev-parse --git-path' errors

This fixes t/mda.t with git 1.8.5

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/PublicInbox/Git.pm b/lib/PublicInbox/Git.pm
index 9c4d938e..6c4fcf93 100644
--- a/lib/PublicInbox/Git.pm
+++ b/lib/PublicInbox/Git.pm
@@ -107,7 +107,9 @@ sub git_path ($$) {
                         $d;
                 } else {
                         local $/ = "\n";
-                        my $s = $self->qx(qw(rev-parse --git-path), $path);
+                        my $rdr = { 2 => \my $err };
+                        my $s = $self->qx([qw(rev-parse --git-path), $path],
+                                        undef, $rdr);
                         chomp $s;
 
                         # git prior to 2.5.0 did not understand --git-path