Bad error message when using a generic method without generic parameters

[Andersama]

Yeah this was a bit confusing, I did eventually work out that I was probably not calling the generic properly.

125:                 usz        items        = end_offset - start_offset;
126:
127:                 if (items <= 32) {
128:                     is::isort(list, start_offset, end_offset, fn bool (ElementType* lhs, ElementType* rhs) {
                             ^^^^^
(C:/Users/ajgam/Desktop/Github/c3c_new/out/build/build/lib/std/sort/countingsort.c3:128:25) Error: 'isort' could not be found in std::sort::is.

[lerno]

This should be better now.