[PATCH] Don't crash if ai_canonname comes back as null

Fixes a weird bug where git-daemon was segfaulting
when started by sh(1) because ai_canonname was null.
---
Fixed based on feedback.

  daemon.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/daemon.c b/daemon.c
index 13401f1..ae21d92 100644
--- a/daemon.c
+++ b/daemon.c

@@ -459,7 +459,7 @@ static void parse_extra_args(char *extra_args, int  

buflen)
  				inet_ntop(AF_INET, &sin_addr->sin_addr,
  					  addrbuf, sizeof(addrbuf));
  				free(canon_hostname);
-				canon_hostname = xstrdup(ai->ai_canonname);
+				canon_hostname = ai->ai_canonname ? xstrdup(ai->ai_canonname) :  
NULL;
  				free(ip_address);
  				ip_address = xstrdup(addrbuf);
  				break;
-- 
1.6.2.GIT