Fix some build issues in the 1.6.2 changes.

FWIW when testing the "GetInput" function, it *is* returning the correct number of input events, but does not seem to actually be storing the values in the passed-in array.

I am unsure what the correct fix is here TBH, I am not familiar enough with c/c# native interop to know if this is a bad way of getting the array changes propagated to C#