* scribo/debug/logger.hh
	(scribo::debug::internal::logger_::log) [!SCRIBO_NDEBUG]:
	Avoid warnings about unused arguments in non-debug mode.
	* scribo/layout/xy_cut.hh
	(scribo::layout::internal::compute_hist_info_h)
	(scribo::layout::internal::compute_hist_info_v):
	Use `def::coord' instead of `int' as coordinate type, to avoid
	comparisons between signed and unsigned values.
	* src/misc/rectangularity.cc (main)
	* tests/binarization/global_threshold.cc (main)
	* tests/layout/xy_cut.cc (main):
	Avoid warnings about unused arguments.
	* tests/core/object_groups.cc (main): Likewise.
	Use `unsigned' instead of `int' as count/id type, to avoid
	comparisons between signed and unsigned values.