[gdm] greeter: fix version display when release file is empty

[Ray Strode <halfline src gnome org>]

commit 4620ebc29cd7d53987af4b834db7668e93ce3b85
Author: Ionut Biru <ibiru archlinux org>
Date:   Mon Dec 6 17:44:44 2010 -0800

    greeter: fix version display when release file is empty
    
    If fgets returns NULL then we need to fail gracefully rather than use
    an uninitialized buffer.
    
    Signed-off-by: Ionut Biru <ibiru archlinux org>

 gui/simple-greeter/gdm-greeter-login-window.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gui/simple-greeter/gdm-greeter-login-window.c b/gui/simple-greeter/gdm-greeter-login-window.c
index ca170a5..0823a3c 100644
--- a/gui/simple-greeter/gdm-greeter-login-window.c
+++ b/gui/simple-greeter/gdm-greeter-login-window.c
@@ -1096,6 +1096,7 @@ file_read_one_line (const char *filename)
 
         if (fgets (buf, sizeof (buf), f) == NULL) {
                 g_warning ("Unable to read from file %s", filename);
+                goto out;
         }
 
         line = g_strdup (buf);