Failed in using surrogate tool of spatial allocator with filter option

Hi, I updated versione 4.2 to the new SA version 4.4 Often I use filter option DISCRETE to filtered shape file.
I compiled the source files in vector64_bits and the output shape file is the same of the input one.
The key routine in the filtering process seems to be parse_include_esclude.c
This routine is different in vector32_bits and vector64_bits source files.
In vector64_bits the piece of the code that, if I well understood, handles DISCRETE option has been deleted, while in source files in vector_32bits it is present. Why?