Partly reverty back patch (in heap-auto-increment-key detection) to ensure that auto_key and auto_key_type are calculated the same way

include/heap.h

@@ -181,8 +181,10 @@ typedef struct st_heap_info
   LIST open_list;
 } HP_INFO;
 
+
 typedef struct st_heap_create_info
 {
+  uint auto_key;                        /* keynr [1 - maxkey] for auto key */
   uint auto_key_type;
   ulong max_table_size;
   ulonglong auto_increment;