http: avoid empty error messages for some curl errors
authorJonathan Nieder <jrnieder@gmail.com>
Mon, 5 Sep 2011 22:22:02 +0000 (17:22 -0500)
committerJunio C Hamano <gitster@pobox.com>
Tue, 6 Sep 2011 22:49:23 +0000 (15:49 -0700)
commitbe22d92eac809ad2bfa2b7c83ad7cad5a15f1c43
tree00b16e38ddba2da091c1091b74bc5ec80e3e76ee
parent8abc5082222b7f65e07453a0aca46ce6d25ce3a5
http: avoid empty error messages for some curl errors

When asked to fetch over SSL without a valid
/etc/ssl/certs/ca-certificates.crt file, "git fetch" writes

error:  while accessing https://github.com/torvalds/linux.git/info/refs

which is a little disconcerting.  Better to fall back to
curl_easy_strerror(result) when the error string is empty, like the
curl utility does:

error: Problem with the SSL CA cert (path? access rights?) while
accessing https://github.com/torvalds/linux.git/info/refs

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
http.c