Update XZ Utils to 5.0.3 (in deps)

src/liblzma/lzma/lzma_encoder.c

 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       lzma_encoder.c
 /// \brief      LZMA encoder
 ///
 //  Authors:    Igor Pavlov
 //              Lasse Collin
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
@@ skipping 316 matching lines @@
                 // everything out from the range encoder. For the same reason,
                 // rc_encode() never returns true when this function is used
                 // as part of LZMA2 encoder.
                 if (rc_encode(&coder->rc, out, out_pos, out_size)) {
                         assert(limit == UINT32_MAX);
                         return LZMA_OK;
                 }
 
                 // With LZMA2 we need to take care that compressed size of
                 // a chunk doesn't get too big.
-                // TODO
+                // FIXME? Check if this could be improved.
                 if (limit != UINT32_MAX
                                 && (mf->read_pos - mf->read_ahead >= limit
                                         || *out_pos + rc_pending(&coder->rc)
                                                 >= LZMA2_CHUNK_MAX
                                                         - LOOP_INPUT_MAX))
                         break;
 
                 // Check that there is some input to process.
                 if (mf->read_pos >= mf->read_limit) {
                         if (mf->action == LZMA_RUN)
@@ skipping 318 matching lines @@
         return LZMA_OK;
 }
 #endif
 
 
 extern LZMA_API(lzma_bool)
 lzma_mode_is_supported(lzma_mode mode)
 {
         return mode == LZMA_MODE_FAST || mode == LZMA_MODE_NORMAL;
 }