addresses #2155 refs[t:2155] Reverse part of r15848.

We run 'backward' recovery and 'forward recovery' on the item we turn around on, so do not set 'forward saw checkpoint begin' state
till we're in forward recovery.

git-svn-id: file:///svn/toku/tokudb@15849 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/recover.c

@@ -578,7 +578,6 @@ static int toku_recover_backward_begin_checkpoint (struct logtype_begin_checkpoi
 	if (ss->n_live_txns==0) {
 	    fprintf(stderr, "Tokudb recovery turning around at begin checkpoint %"PRIu64"\n", l->lsn.lsn);
             renv->goforward = TRUE;
-            ss->ss = SS_FORWARD_SAW_CKPT;
 	    return 0;
 	} else {
 	    fprintf(stderr, "Tokudb recovery begin checkpoint at %"PRIu64" looking for %"PRIu64"\n", l->lsn.lsn, ss->min_live_txn);