* @decode_table: The array in which to create the fast huffman decoding
* table. It must have a length of at least
* (2**table_bits) + 2 * num_syms to guarantee
- * that there is enough space.
+ * that there is enough space. Also must be 16-byte
+ * aligned (at least when USE_SSE2_FILL gets defined).
*
* @num_syms: Number of symbols in the alphabet, including symbols
* that do not appear in this particular input chunk.