correct order of arguments for Dynamic_array<>::CMP_FUNC2

sql/sql_array.h

@@ -239,7 +239,7 @@ template <class Elem> class Dynamic_array
     my_qsort(array.buffer, array.elements, sizeof(Elem), (qsort_cmp)cmp_func);
   }
 
-  typedef int (*CMP_FUNC2)(const Elem *el1, const Elem *el2, void *);
+  typedef int (*CMP_FUNC2)(void *, const Elem *el1, const Elem *el2);
   void sort(CMP_FUNC2 cmp_func, void *data)
   {
     my_qsort2(array.buffer, array.elements, sizeof(Elem), (qsort2_cmp)cmp_func, data);