Solves C7626 error when compiling with MSVC 2019 16.6+

[willyborn]

Solves error C7626 when compiling with MSVC 2019 16.6+

Description

See Microsoft C7626 description.

unnamed typedef classes can generate linkage problems. Starting from MSVC 2019 16.6+, error C7626 is generated when compiling with /std:c++17 or above.
Solution: give the typedef a name (I chose KParam_t)

PS: The linkage problem also exists with GCC and Clang (see P1766R1.)

Changes to Users

None

Checklist

• Rebased on latest master
• Code compiles
• Tests pass
• Functions added to unified API
• Functions documented

[ytian-xxxxxxxx]

It seems the typedef grammar of KParam is not C++ style, after I change to the following code, the build succeeded.
struct KParam {
dim_t dims[4];
dim_t strides[4];
dim_t offset;

#ifndef OPENCL_VERSION
dim_t *dims_ptr() { return dims; }
dim_t *strides_ptr() { return strides; }
#endif
};