*: make exec failure message more consistent

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

coreutils/nice.c

@@ -47,9 +47,8 @@ int nice_main(int argc, char **argv)
 		}
 	}
 
-	BB_EXECVP(*argv, argv);		/* Now exec the desired program. */
-
+	BB_EXECVP(argv[0], argv);
 	/* The exec failed... */
 	xfunc_error_retval = (errno == ENOENT) ? 127 : 126; /* SUSv3 */
-	bb_simple_perror_msg_and_die(*argv);
+	bb_perror_msg_and_die("can't execute '%s'", argv[0]);
 }