[PATCH] git-cvsimport.perl: Bail out right away when reading from the server fails

If the CVS server is down, this reduced the git-cvsimport output from:

ssh: connect to host ijbswa.cvs.sourceforge.net port 22: Connection refused
Use of uninitialized value $rep in scalar chomp at /usr/local/libexec/git-core/git-cvsimport line 369.
Use of uninitialized value $rep in substitution (s///) at /usr/local/libexec/git-core/git-cvsimport line 370.
Expected Valid-requests from server, but got: <unknown>

to the less noisy:

ssh: connect to host ijbswa.cvs.sourceforge.net port 22: Connection refused
Failed to read from server at /usr/local/libexec/git-core/git-cvsimport line 370.

In this case a silent exit() instead of the die() would probably do,
but I assume that there could be cases where the connection attempt
succeeds, but reading from the server fails for other reasons.

Signed-off-by: Fabian Keil <redacted>
---
 git-cvsimport.perl |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

1d8b7c2be2b7dd281a0799735d00c8111404260f

diff --git a/git-cvsimport.perl b/git-cvsimport.perl
index 8e683e5..2a76d9e 100755
--- a/git-cvsimport.perl
+++ b/git-cvsimport.perl

@@ -366,7 +366,9 @@ sub conn {
 	$self->{'socketo'}->write("valid-requests\n");
 	$self->{'socketo'}->flush();
 
-	chomp(my $rep=$self->readline());
+	my $rep=$self->readline();
+	die "Failed to read from server" unless defined $rep;
+	chomp($rep);
 	if ($rep !~ s/^Valid-requests\s*//) {
 		$rep="<unknown>" unless $rep;
 		die "Expected Valid-requests from server, but got: $rep\n";

-- 
1.7.3.5