PGPRO-2534: Page get uninitialized because of PostingItem aligning

Author: za-arthur

src/rumbulk.c

@@ -167,6 +167,7 @@ rumInsertBAEntry(BuildAccumulator *accum,
 	eatmp.category = category;
 	/* temporarily set up single-entry itempointer list */
 	eatmp.list = &item;
+	memset(&item, 0, sizeof(item));
 	item.iptr = *heapptr;
 	item.addInfo = addInfo;
 	item.addInfoIsNull = addInfoIsNull;

src/rumdatapage.c

@@ -1056,6 +1056,7 @@ dataSplitPageLeaf(RumBtree btree, Buffer lbuf, Buffer rbuf,
 	int			maxItemIndex = btree->curitem;
 	static char lpageCopy[BLCKSZ];
 
+	memset(&item, 0, sizeof(item));
 	dataPrepareData(btree, newlPage, off);
 	maxoff = RumPageGetOpaque(newlPage)->maxoff;