&sweep and &mfs to preserve nAnd2Delay

src/aig/gia/giaMfs.c

@@ -470,6 +470,7 @@ Gia_Man_t * Gia_ManInsertMfs( Gia_Man_t * p, Sfm_Ntk_t * pNtk, int fAllBoxes )
     // duplicated initial state
     if ( p->vRegInits )
         pNew->vRegInits = Vec_IntDup( p->vRegInits );
+    pNew->nAnd2Delay = p->nAnd2Delay;
 
     // cleanup
     Vec_WecFree( vGroups );

src/aig/gia/giaSweep.c

@@ -203,6 +203,7 @@ Gia_Man_t * Gia_ManDupWithBoxes( Gia_Man_t * p, int fSeq )
     pNew->pAigExtra = Gia_ManUpdateExtraAig2( p->pManTime, p->pAigExtra, vBoxesLeft );
     assert( Gia_ManCiNum(pNew) == Tim_ManPiNum((Tim_Man_t*)pNew->pManTime) + Gia_ManCoNum(pNew->pAigExtra) );
     Vec_IntFree( vBoxesLeft );
+    pNew->nAnd2Delay = p->nAnd2Delay;
     return pNew;
 }