mesa: Clean up header file inclusion in viewport.h.

diff --git a/src/mesa/main/viewport.h b/src/mesa/main/viewport.h
index ccfa375..909ff92 100644 (file)
--- a/src/mesa/main/viewport.h
+++ b/src/mesa/main/viewport.h
@@ -28,7 +28,8 @@
 #define VIEWPORT_H
 
 #include "glheader.h"
-#include "mtypes.h"
+
+struct gl_context;
 
 extern void GLAPIENTRY
 _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height);