Update bit type

[cgzones]

Avoid potential truncations and compiler warnings:

setools/policyrep.c: In function ‘__pyx_f_7setools_9policyrep_13SELinuxPolicy__rebuild_attrs_from_map’:
setools/policyrep.c:88248:33: warning: comparison of integer expressions of different signedness: ‘int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Wsign-compare]
88248 |       __pyx_t_7 = ((__pyx_v_bit < ebitmap_length((&(__pyx_v_self->handle->p.attr_type_map[__pyx_v_i])))) != 0);
      |                                 ^
setools/policyrep.c:88356:33: warning: comparison of integer expressions of different signedness: ‘int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Wsign-compare]
88356 |       __pyx_t_7 = ((__pyx_v_bit < ebitmap_length((&__pyx_v_tmp_type->types))) != 0);
      |                                 ^