message: travis/windows - fix syntax error in crypto/threads_none.c::openssl_get_fork_id
  it seems that after preprocessing in windows that function ends up having a 'return return 0;' statement
diff: @@ -32,10 +32,11 @@ before_install:
  - tar xzf openssl.tar.gz
  - export OPENSSL_SOURCE=$PWD/openssl-1.1.1d
  # fix source code
  - # this one avoid GDI dependency in windows
  + # avoid GDI dependency in windows, fix double return statement on threads_none.c
  - if [ $os_build == "windows" ]; then
  sed -i 's/if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333/if 0/g' $OPENSSL_SOURCE/crypto/cryptlib.c;
  sed -i 's/MessageBox.*//g' $OPENSSL_SOURCE/crypto/cryptlib.c;
  + sed -i 's/return return 0;/return 0;/g' $OPENSSL_SOURCE/crypto/threads_none.c;
  fi
  # libtorrent: download and checkout revision
  