Returns a pointer to the func_t representing the function number supplied as n. Will return NULL if n is a non-existent function number. It will also only return function entry chunks.
Examples:
#include <funcs.hpp>
// Loop through all functions
for (int i = 0; i < get_func_qty(); i++)
{
func_t *curFunc = getn_func(i);
msg("Function at: %a\n", curFunc->startEA);
}