branches/zip: Minor bug fix

buf_flush_init_for_writing(): Copy FIL_PAGE_LSN to the compressed page.

page_cur_insert_rec_low(): Add debug assertion.

buf/buf0flu.c

@@ -474,6 +474,8 @@ buf_flush_init_for_writing(
 	if (UNIV_LIKELY_NULL(page_zip)) {
 		/* Copy FIL_PAGE_SPACE_OR_CHKSUM and FIL_PAGE_OFFSET */
 		memcpy(page_zip->data, page, FIL_PAGE_PREV);
+		/* Copy FIL_PAGE_LSN */
+		memcpy(page_zip->data + FIL_PAGE_LSN, page + FIL_PAGE_LSN, 8);
 		/* Copy FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID */
 		memcpy(page_zip->data + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID,
 			page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, 4);

page/page0cur.c

@@ -913,6 +913,7 @@ page_cur_insert_rec_low(
 			== (ibool) !!page_is_comp(page));
 
 	ut_ad(!page_rec_is_supremum(cursor->rec));
+	ut_ad(!page_zip || page_zip_validate(page_zip, page));
 
 	/* 1. Get the size of the physical record in the page */
 	rec_size = rec_offs_size(offsets);