Fixed Off-by-one error in gethostname()

MAX_HOSTNAME_LEN is the maximum total characters of the hostname not
including the end of string character '\0'. If the hostname happens to
be 64 characters long, gethostname() would return an error and
shmem_runtime_util_put_hostname() would state error "gethostname failed
(-1)"

Changed length to MAX_HOSTNAME_LEN+1

Issue #1159

Signed-off-by: Mark F. Brown <[email protected]>

src/runtime_util.c

@@ -89,7 +89,7 @@ int shmem_runtime_util_put_hostname(void)
     char hostname[MAX_HOSTNAME_LEN+1];
     int ret;
 
-    ret = gethostname(hostname, MAX_HOSTNAME_LEN);
+    ret = gethostname(hostname, MAX_HOSTNAME_LEN+1);
     if (ret != 0) {
         RETURN_ERROR_MSG("gethostname failed (%d)", ret);
         return ret;