[cogl] doc: Hide the private fields of CoglQuaternion

[Damien Lespiau <dlespiau src gnome org>]

commit a98a69017cdf8879816c1a341e4982b57ef1bc32
Author: Damien Lespiau <damien lespiau intel com>
Date:   Fri May 11 12:20:33 2012 +0100

    doc: Hide the private fields of CoglQuaternion
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 cogl/cogl-quaternion.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl-quaternion.h b/cogl/cogl-quaternion.h
index 1ec9825..76cae29 100644
--- a/cogl/cogl-quaternion.h
+++ b/cogl/cogl-quaternion.h
@@ -127,6 +127,7 @@ struct _CoglQuaternion
   float y;
   float z;
 
+  /*< private >*/
   float padding0;
   float padding1;
   float padding2;