updated for version 7.3.719
Problem:    Cannot run new version of cproto, it fails on missing include
            files.
Solution:   Add lots of #ifndef PROTO
diff --git a/src/gui_w32.c b/src/gui_w32.c
index 3d8d6c7..04658d6 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -198,11 +198,17 @@
 static UINT_PTR	    BevalTimerId = 0;
 static DWORD	    LastActivity = 0;
 
+
+/* cproto fails on missing include files */
+#ifndef PROTO
+
 /*
  * excerpts from headers since this may not be presented
  * in the extremely old compilers
  */
-#include <pshpack1.h>
+# include <pshpack1.h>
+
+#endif
 
 typedef struct _DllVersionInfo
 {
@@ -213,7 +219,9 @@
     DWORD dwPlatformID;
 } DLLVERSIONINFO;
 
-#include <poppack.h>
+#ifndef PROTO
+# include <poppack.h>
+#endif
 
 typedef struct tagTOOLINFOA_NEW
 {