[libunwind] Fixed an upcoming clang -Wsign-conversion warning

Fixing an upcoming clang warning (from https://reviews.llvm.org/D139114) in libunwind.

Differential Revision: https://reviews.llvm.org/D141515

GitOrigin-RevId: 226798f3aa2f8467a29d909f0b18dbc4dfb398f7
1 file changed
tree: f8d2c5e58c9d73547cc26b5724404f9510f0e336
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT