[PATCH] fix an error message in git-push so it goes to stderr

[Larry D'Anna <larry@elder-gods.org>]

Having it go to standard output interferes with git-push --porcelain.
---
 builtin-push.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin-push.c b/builtin-push.c
index 5633f0a..0a27072 100644
--- a/builtin-push.c
+++ b/builtin-push.c
@@ -124,9 +124,9 @@ static int push_with_options(struct transport *transport, int flags)
 		return 0;
 
 	if (nonfastforward && advice_push_nonfastforward) {
-		printf("To prevent you from losing history, non-fast-forward updates were rejected\n"
-		       "Merge the remote changes before pushing again.  See the 'Note about\n"
-		       "fast-forwards' section of 'git push --help' for details.\n");
+		fprintf(stderr, "To prevent you from losing history, non-fast-forward updates were rejected\n"
+				"Merge the remote changes before pushing again.  See the 'Note about\n"
+				"fast-forwards' section of 'git push --help' for details.\n");
 	}
 
 	return 1;
-- 
1.7.0.rc1.33.g07cf0f.dirty