not ready for prime time

tools/fimghalfsize.c

@@ -84,7 +84,10 @@ if (verbosity) {
 	}
 
 foo = faire_un_halfsize(srcname, dstname, grayed);
-
+if (foo) {
+	fprintf(stderr, "in %s: make halfsize give a %d\n", argv[0], foo);
+	exit(1);
+	}
 
 return 0;
 }