Bug#43572 Handle failures from hash_init

The merge from http://lists.mysql.com/commits/76678 caused the 
growth_size parameter to the my_init_dynamic_array function to
be ignored. This patch corrects the problem.

mysys/hash.c

@@ -89,7 +89,7 @@ _my_hash_init(HASH *hash, uint growth_size, CHARSET_INFO *charset,
   hash->flags=flags;
   hash->charset=charset;
   DBUG_RETURN(my_init_dynamic_array_ci(&hash->array, 
-                                       sizeof(HASH_LINK), size, 0));
+                                       sizeof(HASH_LINK), size, growth_size));
 }