Fix a `-Wsign-compare` warning in the `run()` function, which resulted
in many repeated warnings when compiling with `-Wall` due to the many
template instantiations.
Both `clGetKernelSubGroupInfo` queries return a `size_t`, so it is
unclear why the results of these queries were being cast to `int`.
The `dynsc` uses don't seem to work with negative values, so make the
field unsigned.
Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>
Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>