Restore default verbosity for http fetches.

This adds a verbosity level below 0 for suppressing default messages
with --quiet, and makes the default for http be verbose instead of
quiet. This matches the behavior of the shell script version of git-fetch.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-fetch.c b/builtin-fetch.c
index ac68ff5..cf7498b 100644
--- a/builtin-fetch.c
+++ b/builtin-fetch.c
@@ -533,7 +533,7 @@
 	if (verbose >= 2)
 		transport->verbose = 1;
 	if (quiet)
-		transport->verbose = 0;
+		transport->verbose = -1;
 	if (upload_pack)
 		set_option(TRANS_OPT_UPLOADPACK, upload_pack);
 	if (keep)