error: ‘data_block_padding_size’ undeclared in debug build

[bf]

Thanks for this awesome project.

When doing a debug build with ./configure --enable-static-executables=yes --enable-debug-output and make on a linux system, it complains about data_block_padding_size undeclared in libpff_data_block.c:698.

libpff_data_block.c: In function ‘libpff_data_block_read_file_io_handle’:
libpff_data_block.c:698:25: error: ‘data_block_padding_size’ undeclared (first use in this function); did you mean ‘data_block_data_size’?
  698 |                         data_block_padding_size = data_block_footer_offset - data_size;
      |                         ^~~~~~~~~~~~~~~~~~~~~~~
      |                         data_block_data_size
libpff_data_block.c:698:25: note: each undeclared identifier is reported only once for each function it appears in
make[1]: *** [Makefile:950: libpff_data_block.lo] Error 1

Just wanted to let you know even though this is very minor.