dgit: Do not sometimes crash in quilt-fixup if git-debrebase missing

Closes:#910221.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/dgit b/dgit
index beabccea5a93c8ee53ea8fde46ed1accf3b1d337..4cc568457a8305b83dfd83024c909d0dd19654fb 100755 (executable)
--- a/dgit
+++ b/dgit
@@ -5715,7 +5715,10 @@ END
        if (act_local()) {
            debugcmd "+",@cmd;
            $!=0; $?=-1;
-           failedcmd @cmd if system @cmd and $?!=7*256;
+           failedcmd @cmd
+               if system @cmd
+               and not ($? == 7*256 or
+                        $? == -1 && $!==ENOENT);
        } else {
            dryrun_report @cmd;
        }