[Programming] Faster SEE

For some reason I had the following lines inside the see() method. Meaning they were initialized every time the SEE was called:

int[] piece_values = {0,1,3,3,5,9,99,0,99,9,5,3,3,1};
int[] w_attackers = new int[16];
int[] b_attackers = new int[16];
int[] scores = new int[32];

Since we actually do not have to clear any of these at the start of every SEE-check (we keep track of the index and never use what existed there before) I simply moved them out of the method, making them static variables that are not cleared at each call.

This speeded up the SEE-check with about 30-40%. Imagine that. :)

Now SEE is not called that insanely often so in total this small change probably only accounts for a 5-10% speedup overall. But it is a reminder that you have to be careful with your initializations in Java. :)