More VC++ pickiness. (destest.c doesn't have a "return" and the usual

signed/unsigned stuff in s3_pkt.c)

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PR:

crypto/des/destest.c

@@ -796,6 +796,7 @@ plain[8+4], plain[8+5], plain[8+6], plain[8+7]);
 		}
 	printf("\n");
 	exit(err);
+	return(err); /* Never reached, but keeps compilers happy */
 	}
 
 static char *pt(unsigned char *p)