[gtk+] Fix uninitialized digest_len field, causing WebSocket handshake to g_assert.

[Alexander Larsson <alexl src gnome org>]

commit 981efc90b41d52f9785bbff66a94ec71a9174940
Author: C. Scott Ananian <cscott cscott net>
Date:   Fri Nov 11 16:26:12 2011 -0500

    Fix uninitialized digest_len field, causing WebSocket handshake to g_assert.
    
    g_checksum_get_digest checks to ensure that the passed digest_len is long
    enough to hold the digest, before setting it to the actual length of the
    digest returned.  Digest_len is uninitialized in the code, so if you're
    lucky it will be larger than 20 and everything will work fine.  If you're
    unlucky, g_checksum_get_digest will return either -1 or some number less
    than 20, and the g_assert(digest_len==20) will fail.

 gdk/broadway/gdkdisplay-broadway.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/broadway/gdkdisplay-broadway.c b/gdk/broadway/gdkdisplay-broadway.c
index 87fc1c8..5c711b7 100644
--- a/gdk/broadway/gdkdisplay-broadway.c
+++ b/gdk/broadway/gdkdisplay-broadway.c
@@ -660,8 +660,8 @@ send_error (HttpRequest *request,
 static gchar *
 generate_handshake_response_wsietf_v7 (const gchar *key)
 {
-  guchar digest[20];
-  gsize digest_len;
+  gsize digest_len = 20;
+  guchar digest[digest_len];
   GChecksum *checksum;
 
   checksum = g_checksum_new (G_CHECKSUM_SHA1);