[cogl/msvc-support] (8 commits) ...Merge branch 'master' into msvc-support

[Chun-wei Fan <fanchunwei src gnome org>]

Summary of changes:

  2fc0698... Compilation fixes for suncc (*)
  231be91... Combine _cogl_context_check_gl_version and update_features  (*)
  c058b50... texture-pixmap-x11: initialize ->use_winsys_texture (*)
  02ba1a7... texture-pixmap-x11: set ->winsys = NULL if _create fails (*)
  83db796... examples: Add x11-tfp example (*)
  6d79657... egl: if texture_pixmap_x11_create fails free priv data (*)
  db7f087... hello: Make sure to clear background explicitly (*)
  c8ef9af... Merge branch 'master' into msvc-support

(*) This commit already existed in another branch; no separate mail sent