fix: zero new dest pages to avoid double free ovfl cell

source/libs/tdb/src/db/tdbBtree.c

@@ -741,9 +741,13 @@ static int tdbBtreeBalanceNonRoot(SBTree *pBt, SPage *pParent, int idx, TXN *pTx
       tdbBtreeInitPage(pOldsCopy[i], &iarg, 0);
       tdbPageCopy(pOlds[i], pOldsCopy[i], 0);
     }
+
+    for (iNew = 0; iNew < nNews; ++iNew) {
+      tdbBtreeInitPage(pNews[iNew], &iarg, 0);
+    }
+
     iNew = 0;
     nNewCells = 0;
-    tdbBtreeInitPage(pNews[iNew], &iarg, 0);
 
     for (int iOld = 0; iOld < nOlds; iOld++) {
       SPage *pPage;