libunarchive: clean up dirty hacks. code shrank as a result

function                                             old     new   delta
cpio_main                                            526     539     +13
init_handle                                           57      58      +1
init_archive_deb_ar                                   34      35      +1
get_header_ar                                        408     409      +1
dpkg_main                                           3900    3901      +1
unpack_package                                       516     515      -1
rpm_main                                            1673    1672      -1
tar_main                                             774     767      -7
get_header_cpio                                      990     972     -18
data_extract_all                                     750     727     -23
get_header_tar                                      1631    1576     -55
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/6 up/down: 17/-105)           Total: -88 bytes

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