[cogl] doc: Add the missing Depth/Stencil members of CoglPixelFormat

[Damien Lespiau <dlespiau src gnome org>]

commit c83dc41cc89d4fbb3ab355179ac9cdaa0143ff73
Author: Damien Lespiau <damien lespiau intel com>
Date:   Sun Dec 30 19:08:16 2012 +0000

    doc: Add the missing Depth/Stencil members of CoglPixelFormat

 cogl/cogl-types.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl-types.h b/cogl/cogl-types.h
index 690e19c..2de5bcd 100644
--- a/cogl/cogl-types.h
+++ b/cogl/cogl-types.h
@@ -282,6 +282,9 @@ typedef struct _CoglColor               CoglColor;
  * @COGL_PIXEL_FORMAT_BGRA_1010102_PRE: Premultiplied BGRA, 32 bits, 10 bpc
  * @COGL_PIXEL_FORMAT_ARGB_2101010_PRE: Premultiplied ARGB, 32 bits, 10 bpc
  * @COGL_PIXEL_FORMAT_ABGR_2101010_PRE: Premultiplied ABGR, 32 bits, 10 bpc
+ * @COGL_PIXEL_FORMAT_DEPTH_16: Depth, 16 bits
+ * @COGL_PIXEL_FORMAT_DEPTH_32: Depth, 32 bits
+ * @COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8: Depth/Stencil, 24/8 bits
  *
  * Pixel formats used by Cogl. For the formats with a byte per
  * component, the order of the components specify the order in