reduced DEFAULT_SEARCH_STACK_DEPTH

[Suhel Momin]

Hi,

I want to understand what is the impact of changing following #defines

#define DEFAULT_SEARCH_STACK_DEPTH 16
#define MINIMUM_SEARCH_STACK_DEPTH 8

I can see that this value is used to allocate search_stack.

I modified these values to

#define DEFAULT_SEARCH_STACK_DEPTH 4
#define MINIMUM_SEARCH_STACK_DEPTH 2

This helped in reducing memory footprint however I am not sure about the
wide range impact.

Thanks,
Suhel