Bump block stats when adding commitment tx into block (#2654)

src/miner.cpp

@@ -173,6 +173,8 @@ std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& sc
                 pblock->vtx.emplace_back(qcTx);
                 pblocktemplate->vTxFees.emplace_back(0);
                 pblocktemplate->vTxSigOps.emplace_back(0);
+                nBlockSize += qcTx->GetTotalSize();
+                ++nBlockTx;
             }
         }
     }