[cogl] winsys-egl: Use g_clear_error() between two context creation tries

[Damien Lespiau <dlespiau src gnome org>]

commit d384466a580108b6163de5beb77dfc3c143fa2d4
Author: Damien Lespiau <damien lespiau intel com>
Date:   Mon May 16 16:04:33 2011 +0100

    winsys-egl: Use g_clear_error() between two context creation tries
    
    When try_create_context() returns saying that it has to be run again to
    try to create a context with an alternate configuration, it might not
    have a GError set (and in fact it does not right now).
    g_clear_error() handles that case where error is still NULL;

 cogl/winsys/cogl-winsys-egl.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/cogl/winsys/cogl-winsys-egl.c b/cogl/winsys/cogl-winsys-egl.c
index 133e127..268a13a 100644
--- a/cogl/winsys/cogl-winsys-egl.c
+++ b/cogl/winsys/cogl-winsys-egl.c
@@ -882,9 +882,8 @@ create_context (CoglDisplay *display, GError **error)
                                         &try_error)) &&
          try_fallback)
     {
-      g_error_free (try_error);
+      g_clear_error (error);
       cleanup_context (display);
-      try_error = NULL;
       retry_cookie++;
     }
   if (!status)