branches/innodb+: Non-functional change:

ibuf_rec_get_counter(): Rename from ibuf_rec_get_fake_counter().  There is
nothing fake about the counter.  Also add const qualifiers to the pointers.

btr/btr0cur.c

@@ -708,7 +708,7 @@ retry_page_get:
 			& REC_INFO_MIN_REC_FLAG;
 
 		if (!is_min_rec) {
-			cursor->ibuf_cnt = ibuf_rec_get_fake_counter(node_ptr);
+			cursor->ibuf_cnt = ibuf_rec_get_counter(node_ptr);
 
 			ut_a(cursor->ibuf_cnt <= 0xFFFF
 			     || cursor->ibuf_cnt == ULINT_UNDEFINED);

ibuf/ibuf0ibuf.c

@@ -1227,13 +1227,14 @@ Read the first two bytes from a record's fourth field (counter field in new
 records; something else in older records). */
 UNIV_INTERN
 ulint
-ibuf_rec_get_fake_counter(
-/*======================*/
-			/* out: "counter" field, or ULINT_UNDEFINED if for
-			some reason it can't be read*/
-	rec_t*	rec)	/* in: ibuf record */
+ibuf_rec_get_counter(
+/*=================*/
+				/* out: "counter" field,
+				or ULINT_UNDEFINED if for
+				some reason it can't be read */
+	const rec_t*	rec)	/* in: ibuf record */
 {
-	byte*		ptr;
+	const byte*	ptr;
 	ulint		len;
 
 	if (rec_get_n_fields_old(rec) < 4) {

include/ibuf0ibuf.h

@@ -337,11 +337,12 @@ Read the first two bytes from a record's fourth field (counter field in new
 records; something else in older records). */
 UNIV_INTERN
 ulint
-ibuf_rec_get_fake_counter(
-/*======================*/
-			/* out: "counter" field, or ULINT_UNDEFINED if for
-			some reason it can't be read*/
-	rec_t*	rec);	/* in: ibuf record */
+ibuf_rec_get_counter(
+/*=================*/
+				/* out: "counter" field,
+				or ULINT_UNDEFINED if for
+				some reason it can't be read */
+	const rec_t*	rec);	/* in: ibuf record */
 
 #define IBUF_HEADER_PAGE_NO	FSP_IBUF_HEADER_PAGE_NO
 #define IBUF_TREE_ROOT_PAGE_NO	FSP_IBUF_TREE_ROOT_PAGE_NO