swrast: Clean up header file inclusion in s_alpha.h.

Include mtypes.h for GLcontext symbol.
Include s_span.h for SWspan symbol.

diff --git a/src/mesa/swrast/s_alpha.h b/src/mesa/swrast/s_alpha.h
index 7a5b72e..239484a 100644 (file)
--- a/src/mesa/swrast/s_alpha.h
+++ b/src/mesa/swrast/s_alpha.h
@@ -28,7 +28,8 @@
 #define S_ALPHA_H
 
 
-#include "s_context.h"
+#include "main/mtypes.h"
+#include "s_span.h"
 
 
 extern GLint