http-push: fix xml_entities() string parsing overrun

xml_entities() in http-push.c did not properly stop at the end of the
string being examined, which would occasionally cause nonsense to be
appended to escaped URL strings and result in failed DAV XML queries

Signed-off-by: Seth Hunter <hunter@ll.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/http-push.c b/http-push.c
index 8cc8ee0dfd..00e83dcec1 100644
--- a/http-push.c
+++ b/http-push.c
@@ -193,6 +193,8 @@ static char *xml_entities(char *s)
 		case '&':
 			strbuf_addstr(&buf, "&");
 			break;
+		case 0:
+			return strbuf_detach(&buf, NULL);
 		}
 		s++;
 	}