Commit e6b22d3d for libheif

commit e6b22d3dadea6f8503e2b37194f19784c6f28eea
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Mon Dec 15 19:17:52 2025 +0100

    mark variable as maybe_unused

diff --git a/libheif/bitstream.cc b/libheif/bitstream.cc
index b5db402f..aac024cc 100644
--- a/libheif/bitstream.cc
+++ b/libheif/bitstream.cc
@@ -460,7 +460,7 @@ std::string BitstreamRange::read_string_until_eof()
 {
   size_t n = get_remaining_bytes();

-  bool success = prepare_read(n);
+  [[maybe_unused]] bool success = prepare_read(n);
   assert(success); // we are reading exactly the rest of the box

   std::string str;