vi: code shrink

vi: code shrink

function                                             old     new   delta
char_search                                          241     247      +6
get_one_address                                      275     272      -3
colon                                               2878    2875      -3
do_cmd                                              4726    4720      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 6/-12)              Total: -6 bytes

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