trivial FT2 bug in mi_write fixed

(same as ChangeSet@1.1538.36.1, 2003-06-12 12:41:29+02:00, serg@serg.mylan, "FT2 bug in mi_delete fixed")
BUG#2417

myisam/mi_write.c

@@ -378,7 +378,7 @@ static int w_search(register MI_INFO *info, register MI_KEYDEF *keyinfo,
         my_off_t root=info->dupp_key_pos;
         keyinfo=&info->s->ft2_keyinfo;
         key+=off;
-        keypos-=keyinfo->keylength; /* we'll modify key entry 'in vivo' */
+        keypos-=keyinfo->keylength+nod_flag; /* we'll modify key entry 'in vivo' */
         error=_mi_ck_real_write_btree(info, keyinfo, key, 0,
                                       &root, comp_flag);
         _mi_dpointer(info, keypos+HA_FT_WLEN, root);