c/view_sizes: test the other way for void* too
c/view_sizes: test the other way for void* too

This helps to quickly answer some questions about
__builtin_types_compatible_p(), even though print_compatibility() tests
both (x,y) and (y,x) in order to check the symmetry.

fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared