howbig#
howbig($typecode) — size in bytes of a PDL type, by integer type code.
Mirrors upstream PDL::Core::howbig (PP-generated from Core.pd:
pp_def('howbig', GenericTypes => \@all, Pars => 'int a(); int [o]b();', ...)). Free function, callable as
PDL::Core::howbig(10) and re-exported via *PDL::howbig.
PDL::Types.pm:556 also calls this to back the $type->howbig
method.