[PATCH][BZ #2801] Fix gethostbyname_r example.

[Ondřej Bílka]

Hi, here we fix example as we need to return allocated structure, not
pointer to local variable. OK to commit?

	[BZ #2801]
	* manual/socket.texi: Fix gethostbyname_r example.

diff --git a/manual/socket.texi b/manual/socket.texi
index 25c35c4..74917ea 100644
--- a/manual/socket.texi
+++ b/manual/socket.texi
@@ -1307,17 +1307,18 @@ Here's a small example:
 struct hostent *
 gethostname (char *host)
 @{
-  struct hostent hostbuf, *hp;
+  struct hostent *hostbuf, *hp;
   size_t hstbuflen;
   char *tmphstbuf;
   int res;
   int herr;
 
+  hostbuf = malloc (sizeof (struct hostent));
   hstbuflen = 1024;
   /* Allocate buffer, remember to free it to avoid memory leakage.  */
   tmphstbuf = malloc (hstbuflen);
 
-  while ((res = gethostbyname_r (host, &hostbuf, tmphstbuf, hstbuflen,
+  while ((res = gethostbyname_r (host, hostbuf, tmphstbuf, hstbuflen,
                                  &hp, &herr)) == ERANGE)
     @{
       /* Enlarge the buffer.  */