Signed-off-by: Philipp Pracht <pracht@pc.rwth-aachen.de>

Signed-off-by: MtoLStoN <70513124+MtoLStoN@users.noreply.github.com>

MSVC cl has stricter rules about constants than other compilers
(e.g variables declared `const` are not constant at compile time and so
aren't consider constant). This means the compiler won't allow `const`
variables to be used to declare array sizes.

The changes here explicitly allocate/free memory for arrays so that
the MSVC cl compiler can run this example. The c-api itself should work
without these changes, but the example was incompatible and was halting
compilation.

Signed-off-by: Ty <ty.balduf@schrodinger.com>