Two-node vfs2 unit test

src/vfs2.c

@@ -1710,6 +1710,9 @@ int vfs2_add_uncommitted(sqlite3_file *file,
 	struct file *xfile = (struct file *)file;
 	PRE(xfile->flags & SQLITE_OPEN_MAIN_DB);
 	struct entry *e = xfile->entry;
+	if (e->page_size == 0) {
+		e->page_size = page_size;
+	}
 	PRE(page_size == e->page_size);
 	int rv;