branches/zip: Fix a bug in the insertion of a record.

page_dir_split_slot(): Do not pass page_zip to page_dir_slot_set_n_owned(),
because the caller will rewrite the dense page directory later.  At this
point of execution, the dense directory will not contain the newly inserted
record, which may end up being written to new_slot.

page/page0page.c

@@ -1251,12 +1251,14 @@ page_dir_split_slot(
 	/* 3. We store the appropriate values to the new slot. */
 
 	page_dir_slot_set_rec(new_slot, rec);
-	page_dir_slot_set_n_owned(new_slot, page_zip, n_owned / 2);
+	/* Pass page_zip==NULL here, because the caller will rewrite
+	the dense page directory by invoking page_zip_dir_rewrite(). */
+	page_dir_slot_set_n_owned(new_slot, NULL, n_owned / 2);
 
 	/* 4. Finally, we update the number of records field of the
 	original slot */
 
-	page_dir_slot_set_n_owned(slot, page_zip, n_owned - (n_owned / 2));
+	page_dir_slot_set_n_owned(slot, NULL, n_owned - (n_owned / 2));
 }
 
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