Update XZ Utils to 5.0.3 (in deps)

src/liblzma/api/lzma/block.h

 /**
  * \file        lzma/block.h
  * \brief       .xz Block handling
  */
 
 /*
  * Author: Lasse Collin
  *
  * This file has been put into the public domain.
  * You can do whatever you want with this file.
@@ skipping 300 matching lines @@
  * \brief       Decode Block Header
  *
  * block->version should be set to the highest value supported by the
  * application; currently the only possible version is zero. This function
  * will set version to the lowest value that still supports all the features
  * required by the Block Header.
  *
  * The size of the Block Header must have already been decoded with
  * lzma_block_header_size_decode() macro and stored to block->header_size.
  *
- * block->filters must have been allocated, but not necessarily initialized.
- * Possible existing filter options are _not_ freed.
+ * block->filters must have been allocated, but they don't need to be
+ * initialized (possible existing filter options are not freed).
  *
  * \param       block       Destination for Block options.
  * \param       allocator   lzma_allocator for custom allocator functions.
  *                          Set to NULL to use malloc() (and also free()
  *                          if an error occurs).
  * \param       in          Beginning of the input buffer. This must be
  *                          at least block->header_size bytes.
  *
  * \return      - LZMA_OK: Decoding was successful. block->header_size
  *                bytes were read from the input buffer.
@@ skipping 143 matching lines @@
  * \param       in          Beginning of the input buffer
  * \param       in_size     Size of the input buffer
  * \param       out         Beginning of the output buffer
  * \param       out_pos     The next byte will be written to out[*out_pos].
  *                          *out_pos is updated only if encoding succeeds.
  * \param       out_size    Size of the out buffer; the first byte into
  *                          which no data is written to is out[out_size].
  *
  * \return      - LZMA_OK: Encoding was successful.
  *              - LZMA_BUF_ERROR: Not enough output buffer space.
+ *              - LZMA_UNSUPPORTED_CHECK
  *              - LZMA_OPTIONS_ERROR
  *              - LZMA_MEM_ERROR
  *              - LZMA_DATA_ERROR
  *              - LZMA_PROG_ERROR
  */
 extern LZMA_API(lzma_ret) lzma_block_buffer_encode(
                 lzma_block *block, lzma_allocator *allocator,
                 const uint8_t *in, size_t in_size,
                 uint8_t *out, size_t *out_pos, size_t out_size)
                 lzma_nothrow lzma_attr_warn_unused_result;
@@ skipping 24 matching lines @@
  *              - LZMA_DATA_ERROR
  *              - LZMA_MEM_ERROR
  *              - LZMA_BUF_ERROR: Output buffer was too small.
  *              - LZMA_PROG_ERROR
  */
 extern LZMA_API(lzma_ret) lzma_block_buffer_decode(
                 lzma_block *block, lzma_allocator *allocator,
                 const uint8_t *in, size_t *in_pos, size_t in_size,
                 uint8_t *out, size_t *out_pos, size_t out_size)
                 lzma_nothrow;