fixed some bugs:

- switch with BIG difference between lower and upper now handled correctly
- made sure an added error production is never chosen as the default one
- don't allow AUTO as specification for a parameter

lang/cem/cemcom/domacro.c

@@ -242,7 +242,7 @@ do_include()
 	inctable[0] = WorkingDir;
 	if (filenm) {
 		if (!InsertFile(filenm, &inctable[tok==FILESPECIFIER],&result)){
-			fatal("cannot find include file \"%s\"", filenm);
+			fatal("cannot open include file \"%s\"", filenm);
 		}
 		else {
 			WorkingDir = getwdir(result);