MDEV-25745: Not applying INSERT_REUSE_REDUNDANT

page_apply_insert_redundant(): Correct a condition that would
occasionally fail when recovering changes for the change buffer tree
(where extra_size and data_size can vary wildly).

This was broken in commit 138cbec
(MDEV-21724).

storage/innobase/page/page0cur.cc

@@ -2443,7 +2443,7 @@ bool page_apply_insert_redundant(const buf_block_t &block, bool reuse,
     if (UNIV_UNLIKELY(free_rec - fextra_size < heap_bot))
       goto corrupted;
     const ulint fdata_size= rec_get_data_size_old(free_rec);
-    if (UNIV_UNLIKELY(free_rec + data_size > heap_top))
+    if (UNIV_UNLIKELY(free_rec + fdata_size > heap_top))
       goto corrupted;
     if (UNIV_UNLIKELY(extra_size + data_size > fextra_size + fdata_size))
       goto corrupted;