This is a follow-up from #189 and was also found while analyzing the code with Frama-C/Eva abstract interpreter. Actually, in tdefl_record_literal, d->m_pLZ_flags can point to the successive elements of d->m_lz_code_buf, and the PR mentioned above only initializes the first one. The proposed patch is to initialize each element to 0 as soon as we increment d->m_pLZ_flags.

An alternative solution would of course consist in memseting the entire array to 0 in tdefl_init instead of initializing only the first element.