wavlike.c: Fix subchunk parsing bug
wavlike.c: Fix subchunk parsing bug

The function `wavlike_subchunk_parse` was failing to parse files with
a `LIST` chunk containing an `adtl` chunk that was bigger than a
statically sized buffer.

Closes: https://github.com/erikd/libsndfile/issues/167

erikd/libsndfile,evpobr/libsndfile,erikd/libsndfile,evpobr/libsndfile,evpobr/libsndfile,libsndfile/libsndfile,libsndfile/libsndfile,erikd/libsndfile,libsndfile/libsndfile,libsndfile/libsndfile,erikd/libsndfile,evpobr/libsndfile,erikd/libsndfile,libsndfile/libsndfile,evpobr/libsndfile