Fix the time of an intmax_t calculation; it is unsigned. Also print

it with the correct formatting (%ju, not %lld). GCC's -Wformat does
not understand this, so turn on NO_WERROR.

usr.bin/tcopy/Makefile

@@ -1,5 +1,7 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
+# $FreeBSD$
 
 PROG=	tcopy
+NO_WERROR=yes
 
 .include <bsd.prog.mk>

usr.bin/tcopy/tcopy.c

@@ -290,7 +290,7 @@ intr(signo)
 			fprintf(msg, "record %qu\n", lastrec);
 	}
 	fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
-	fprintf(msg, "total length: %lld bytes\n", (intmax_t)(tsize + size));
+	fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size));
 	exit(1);
 }