hush: Fix assignments being misinterpreted as commands

If there were no variable substitutions in a command, then initial
assignments would be misinterpreted as commands, instead of being skipped
over. This is demonstrated by the following example:

	=> foo=bar echo baz
	Unknown command 'foo=bar' - try 'help'

Signed-off-by: Sean Anderson <seanga2@gmail.com>

common/cli_hush.c

@@ -1673,7 +1673,7 @@ static int run_pipe_real(struct pipe *pi)
 			return -1;
 		}
 		/* Process the command */
-		return cmd_process(flag, child->argc, child->argv,
+		return cmd_process(flag, child->argc - i, child->argv + i,
 				   &flag_repeat, NULL);
 #endif
 	}