P9C shell skips last command in history

[Daniel Solaz]

possibly a buglet in the shell history code:

node> cmd1().
ok
node> cmd2().
ok
node>

at this point, pressing 'up' makes "cmd2()." appear on the command line

now press 'down' to return to the empty command line

until a new command is executed, 'up' will skip "cmd2()." every time

I noticed this in P9C of 28 and 30 July (FreeBSD 4.8); does not happen in 
R9B-1

-Daniel