fix questionable UNIV_EXPECT's in the xtradb that confused old gcc.

storage/xtradb/include/rem0rec.ic

@@ -268,7 +268,7 @@ rec_get_next_ptr_const(
 		return(NULL);
 	}
 
-	if (UNIV_EXPECT(comp, REC_OFFS_COMPACT)) {
+	if (UNIV_LIKELY(comp != 0)) {
 #if UNIV_PAGE_SIZE <= 32768
 		/* Note that for 64 KiB pages, field_value can 'wrap around'
 		and the debug assertion is not valid */
@@ -336,7 +336,7 @@ rec_get_next_offs(
 
 	field_value = mach_read_from_2(rec - REC_NEXT);
 
-	if (UNIV_EXPECT(comp, REC_OFFS_COMPACT)) {
+	if (UNIV_LIKELY(comp != 0)) {
 #if UNIV_PAGE_SIZE <= 32768
 		/* Note that for 64 KiB pages, field_value can 'wrap around'
 		and the debug assertion is not valid */
@@ -647,7 +647,7 @@ rec_get_info_and_status_bits(
 & (REC_INFO_BITS_MASK >> REC_INFO_BITS_SHIFT)
 # error "REC_NEW_STATUS_MASK and REC_INFO_BITS_MASK overlap"
 #endif
-	if (UNIV_EXPECT(comp, REC_OFFS_COMPACT)) {
+	if (UNIV_LIKELY(comp != 0)) {
 		bits = rec_get_info_bits(rec, TRUE) | rec_get_status(rec);
 	} else {
 		bits = rec_get_info_bits(rec, FALSE);
@@ -683,7 +683,7 @@ rec_get_deleted_flag(
 	const rec_t*	rec,	/*!< in: physical record */
 	ulint		comp)	/*!< in: nonzero=compact page format */
 {
-	if (UNIV_EXPECT(comp, REC_OFFS_COMPACT)) {
+	if (UNIV_LIKELY(comp != 0)) {
 		return(UNIV_UNLIKELY(
 			       rec_get_bit_field_1(rec, REC_NEW_INFO_BITS,
 						   REC_INFO_DELETED_FLAG,