FIX: have reb-args.h included also in external Rebol extensions

Author: Oldes

make/tools/amalgamate-ext.r3

@@ -95,6 +95,7 @@ context [
 	write    %../../build/rebol-extension.h amalgamate [
 		%reb-c.h
 		%reb-ext.h
+		%reb-args.h
 		%reb-device.h
 		%reb-file.h
 		%reb-filereq.h

src/include/reb-ext.h

@@ -31,10 +31,6 @@
 #include "sys-value.h"
 
 
-#ifndef REBARGS
-#define REBARGS void
-#endif
-
 /* Prefix naming conventions:
 
   RL:  REBOL library API function (or function access macro)