lib:compression: Initialize variables

lib:compression: Initialize variables

lib/compression/tests/test_lzx_huffman.c: In function ‘test_lzxpress_huffman_overlong_matches’:
lib/compression/tests/test_lzx_huffman.c:1013:35: error: ‘j’ may be used uninitialized [-Werror=maybe-uninitialized]
 1013 |         assert_int_equal(score, i * j);
      |                                   ^
lib/compression/tests/test_lzx_huffman.c:979:19: note: ‘j’ was declared here
  979 |         size_t i, j;
      |                   ^
lib/compression/tests/test_lzx_huffman.c: In function ‘test_lzxpress_huffman_overlong_matches_abc’:
lib/compression/tests/test_lzx_huffman.c:1059:39: error: ‘k’ may be used uninitialized [-Werror=maybe-uninitialized]
 1059 |         assert_int_equal(score, i * j * k);
      |                                       ^
lib/compression/tests/test_lzx_huffman.c:1020:22: note: ‘k’ was declared here
 1020 |         size_t i, j, k;
      |                      ^
lib/compression/tests/test_lzx_huffman.c:1059:35: error: ‘j’ may be used uninitialized [-Werror=maybe-uninitialized]
 1059 |         assert_int_equal(score, i * j * k);
      |                                   ^
lib/compression/tests/test_lzx_huffman.c:1020:19: note: ‘j’ was declared here
 1020 |         size_t i, j, k;
      |                   ^

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Sun Dec  4 09:12:30 UTC 2022 on sn-devel-184