[cogl/cogl-1.20] winsys-glx: Add error traps in create_context

[Emmanuele Bassi <ebassi src gnome org>]

commit a63824a6579f8e926249723ed4c564eecad1ef78
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sun Jul 26 11:27:00 2015 +0200

    winsys-glx: Add error traps in create_context
    
    Both create_gl3_context and glXCreateNewContext can fail with an X error.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742678
    Signed-off-by: Emmanuele Bassi <ebassi gnome org>

 cogl/winsys/cogl-winsys-glx.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/cogl/winsys/cogl-winsys-glx.c b/cogl/winsys/cogl-winsys-glx.c
index 34fb071..122ecbb 100644
--- a/cogl/winsys/cogl-winsys-glx.c
+++ b/cogl/winsys/cogl-winsys-glx.c
@@ -1075,6 +1075,8 @@ create_context (CoglDisplay *display, CoglError **error)
   COGL_NOTE (WINSYS, "Creating GLX Context (display: %p)",
              xlib_renderer->xdpy);
 
+  _cogl_xlib_renderer_trap_errors (display->renderer, &old_state);
+
   if (display->renderer->driver == COGL_DRIVER_GL3)
     glx_display->glx_context = create_gl3_context (display, config);
   else
@@ -1085,7 +1087,8 @@ create_context (CoglDisplay *display, CoglError **error)
                                          NULL,
                                          True);
 
-  if (glx_display->glx_context == NULL)
+  if (_cogl_xlib_renderer_untrap_errors (display->renderer, &old_state) ||
+      glx_display->glx_context == NULL)
     {
       _cogl_set_error (error, COGL_WINSYS_ERROR,
                    COGL_WINSYS_ERROR_CREATE_CONTEXT,