[cogl] test-gles2-context: Fix error checking for cogl_gles2_context_new

[Neil Roberts <nroberts src gnome org>]

commit 61cbbb3000fb4001d51999fd05179c620b7e56bf
Author: Neil Roberts <neil linux intel com>
Date:   Tue Aug 7 15:11:40 2012 +0100

    test-gles2-context: Fix error checking for cogl_gles2_context_new
    
    The test was passing NULL as the error argument but then trying to use
    the error object if it failed so it would just crash in that case.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 tests/conform/test-gles2-context.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/conform/test-gles2-context.c b/tests/conform/test-gles2-context.c
index ff0db16..fdb796f 100644
--- a/tests/conform/test-gles2-context.c
+++ b/tests/conform/test-gles2-context.c
@@ -159,7 +159,7 @@ create_gles2_context (CoglTexture **offscreen_texture,
   *pipeline = cogl_pipeline_new (test_ctx);
   cogl_pipeline_set_layer_texture (*pipeline, 0, *offscreen_texture);
 
-  *gles2_ctx = cogl_gles2_context_new (test_ctx, NULL);
+  *gles2_ctx = cogl_gles2_context_new (test_ctx, &error);
   if (!*gles2_ctx)
     g_error ("Failed to create GLES2 context: %s\n", error->message);