st/mesa: Add forward delcaration in st_extensions.h.

diff --git a/src/mesa/state_tracker/st_extensions.h b/src/mesa/state_tracker/st_extensions.h
index 2994f16..aa9b2b2 100644 (file)
--- a/src/mesa/state_tracker/st_extensions.h
+++ b/src/mesa/state_tracker/st_extensions.h
@@ -30,6 +30,8 @@
 #define ST_EXTENSIONS_H
 
 
+struct st_context;
+
 extern void st_init_limits(struct st_context *st);
 
 extern void st_init_extensions(struct st_context *st);