gnutls_ext_register causing memory corruption

[Simon Josefsson]

Does this patch work?

I haven't tested it, but it seems gnutls_global_init ->
gnutls_global_deinit -> gnutls_global_init would crash like the crash in
the bug report.  GnuTLS 2.6.x had a memory leak and didn't release this
memory, so you wouldn't notice.

/Simon


diff --git a/lib/gnutls_extensions.c b/lib/gnutls_extensions.c
index e4e536f..accb204 100644
--- a/lib/gnutls_extensions.c
+++ b/lib/gnutls_extensions.c
@@ -331,6 +331,7 @@ void
 _gnutls_ext_deinit (void)
 {
   gnutls_free (extfunc);
+  extfunc = NULL;
 }
 
 /**