Update XZ Utils to 5.0.3 (in deps)

src/liblzma/delta/delta_encoder.c

 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       delta_encoder.c
 /// \brief      Delta filter encoder
 //
 //  Author:     Lasse Collin
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
 //
@@ skipping 67 matching lines @@
 
                 encode_in_place(coder, out + out_start, *out_pos - out_start);
         }
 
         return ret;
 }
 
 
 static lzma_ret
 delta_encoder_update(lzma_coder *coder, lzma_allocator *allocator,
-                const lzma_filter *filters_null lzma_attribute((unused)),
+                const lzma_filter *filters_null lzma_attribute((__unused__)),
                 const lzma_filter *reversed_filters)
 {
         // Delta doesn't and will never support changing the options in
         // the middle of encoding. If the app tries to change them, we
         // simply ignore them.
         return lzma_next_filter_update(
                         &coder->next, allocator, reversed_filters + 1);
 }
 
 
@@ skipping 13 matching lines @@
         // The caller must have already validated the options, so it's
         // LZMA_PROG_ERROR if they are invalid.
         if (lzma_delta_coder_memusage(options) == UINT64_MAX)
                 return LZMA_PROG_ERROR;
 
         const lzma_options_delta *opt = options;
         out[0] = opt->dist - LZMA_DELTA_DIST_MIN;
 
         return LZMA_OK;
 }