Rob Shearman : kernel32: Fix crash in dns_gethostbyname.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e716c5b1ef8674e24205eb85c4d85880f20e3c44
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e716c5b1ef8674e24205eb85c4d85880f20e3c44

Author: Rob Shearman <rob at codeweavers.com>
Date:   Thu Feb 22 14:35:31 2007 +0000

kernel32: Fix crash in dns_gethostbyname.

---

 dlls/kernel32/computername.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/dlls/kernel32/computername.c b/dlls/kernel32/computername.c
index eebaed7..db9799a 100644
--- a/dlls/kernel32/computername.c
+++ b/dlls/kernel32/computername.c
@@ -89,9 +89,14 @@ static BOOL dns_gethostbyname ( char *name, int *size )
         ebufsize *= 2;
         extrabuf = HeapReAlloc( GetProcessHeap(), 0, extrabuf, ebufsize ) ;
     }
-    
+
     if ( res )
         WARN ("Error in gethostbyname_r %d (%d)\n", res, locerr);
+    else if ( !host )
+    {
+        WARN ("gethostbyname_r returned NULL host, locerr = %d\n", locerr);
+        res = 1;
+    }
     else
     {
         int len = strlen ( host->h_name );