[gsound] docs: document the object struct

[Stefan Kost <stefkost src gnome org>]

commit c00086aaef6319ee284bdb5f9a6ba5b88230c3a5
Author: Stefan Sauer <ensonic users sf net>
Date:   Wed Dec 31 20:26:19 2014 +0100

    docs: document the object struct
    
    This is required for gtkdoc to accept this as a public type. This in turn fixes
    the interfaces section.
    Fixes #740956

 gsound/gsound-context.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gsound/gsound-context.h b/gsound/gsound-context.h
index 4c0df87..cb56868 100644
--- a/gsound/gsound-context.h
+++ b/gsound/gsound-context.h
@@ -33,6 +33,13 @@ G_BEGIN_DECLS
 typedef struct _GSoundContext GSoundContext;
 typedef struct _GSoundContextClass GSoundContextClass;
 
+/**
+ * GSoundContext:
+ * ca: the wrapped context
+ *
+ * Wrapper for ca_context.
+ */
+
 #define GSOUND_ERROR (gsound_error_quark())
 GQuark gsound_error_quark(void);