dgit: update-vcs-git: Do not crash if url is unchanged

Previously, we would pass an empty command array to runcmd, causing a
mysterious-looking failure.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/dgit b/dgit
index 687ef64..d57b643 100755
--- a/dgit
+++ b/dgit
@@ -4985,7 +4985,7 @@ sub cmd_update_vcs_git () {
 	print STDERR f_ "changing vcs-git url to: %s\n", $url;
 	@cmd = (@git, qw(remote set-url vcs-git), $url);
     }
-    runcmd_ordryrun_local @cmd;
+    runcmd_ordryrun_local @cmd if @cmd;
     if ($dofetch) {
 	print f_ "fetching (%s)\n", "@ARGV";
 	runcmd_ordryrun_local @git, qw(fetch vcs-git), @ARGV;