Add st_api_private to st_context.

Similiar to st_framebuffer, we do not want to force the state tracker to
inherit st_context.

1 files changed, 5 insertions, 0 deletions

diff --git a/st_api.h b/st_api.h
index 81c03ae..4f0e9bc 100644
--- a/st_api.h
+++ b/st_api.h
@@ -249,6 +249,11 @@ struct st_context
 		unsigned mask);
 
    void (*destroy)(struct st_context *stctx);
+
+   /**
+    * Available for the state tracker to use.
+    */
+   void *st_api_private;
 };
 
 /**