[glib] gcredentials: Add assertion to pacify static analysis

[Colin Walters <walters src gnome org>]

commit 91821974e1e9e71fb5f2c623f68c0c9e2a6a59a9
Author: Colin Walters <walters verbum org>
Date:   Tue Jul 22 14:31:25 2014 -0400

    gcredentials: Add assertion to pacify static analysis
    
    This should always be true.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733576

 gio/gcredentials.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gio/gcredentials.c b/gio/gcredentials.c
index 3c01027..6673afd 100644
--- a/gio/gcredentials.c
+++ b/gio/gcredentials.c
@@ -335,6 +335,7 @@ credentials_native_type_check (GCredentialsType  requested_type,
 
 #if G_CREDENTIALS_SUPPORTED
   supported = g_enum_get_value (enum_class, G_CREDENTIALS_NATIVE_TYPE);
+  g_assert (supported);
   g_warning ("g_credentials_%s_native: Trying to %s credentials of type %s "
              "but only %s is supported on this platform.",
              op, op,