[mutter] MetaBackendNative: Initialize GError pointer

[Jonas Ådahl <jadahl src gnome org>]

commit 7fa3f41df294e3b90f0eeee8a5ba067283d1c815
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 28 13:57:57 2016 +0800

    MetaBackendNative: Initialize GError pointer
    
    Initialize the GError pointer used when creating the renderer. If an
    error occurs, the error is expected to be NULL, otherwise it'll
    misinterpreted as already set.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773629

 src/backends/native/meta-backend-native.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/backends/native/meta-backend-native.c b/src/backends/native/meta-backend-native.c
index 09b235b..d64019e 100644
--- a/src/backends/native/meta-backend-native.c
+++ b/src/backends/native/meta-backend-native.c
@@ -290,7 +290,7 @@ meta_backend_native_create_renderer (MetaBackend *backend)
   MetaBackendNativePrivate *priv =
     meta_backend_native_get_instance_private (native);
   int kms_fd;
-  GError *error;
+  GError *error = NULL;
   MetaRendererNative *renderer_native;
 
   kms_fd = meta_launcher_get_kms_fd (priv->launcher);