This actually fixes a rather obscure bug. This was failing to find
end of the string:
$ echo -n '[foo]' | dc
dc: string end could not be found
function old new delta
zbc_lex_next 2230 2141 -89
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-89) Total: -89 bytes
text data bss dec hex filename
981461 485 7296 989242 f183a busybox_old
981372 485 7296 989153 f17e1 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
ef271da33f