gallium: fix warning

diff --git a/src/mesa/pipe/softpipe/sp_winsys.h b/src/mesa/pipe/softpipe/sp_winsys.h
index cbf64ebb8503a4ccc1ad081a886421e5d5703f25..d6b379f58c6416fce1cf5e960a16f731694be3c0 100644 (file)
--- a/src/mesa/pipe/softpipe/sp_winsys.h
+++ b/src/mesa/pipe/softpipe/sp_winsys.h
@@ -37,6 +37,7 @@
 
 #include "pipe/p_compiler.h" /* for boolean */
 
+enum pipe_format;
 
 struct softpipe_winsys {
    /** test if the given format is supported for front/back color bufs */