Added Royal Flush checker.

src/util/array.h

@@ -56,7 +56,7 @@ void arraySort(size_t size, void *array, int32_t length, arraysort_t *sort);
  */
 void arraySortInt32(int32_t *array, int32_t length);
 /** Internal int32_t array sorter. */
-int32_t _arraySorterInt32(void *left, void*right);
+int32_t _arraySorterInt32(const void *left, const void* right);
 
 /**
  * Sort a uint8_t array.