Use a more precise argument for memset()

Author: dr-m

storage/innobase/buf/buf0buddy.cc

@@ -132,7 +132,7 @@ buf_buddy_stamp_free(
 buf_buddy_free_t*	buf,/*!< in/out: block to stamp */
 ulint	i)/*!< in: block size */
 {
-ut_d(memset(buf, static_cast<int>(i), BUF_BUDDY_LOW << i));
+ut_d(memset(&buf->stamp.bytes, int(i), BUF_BUDDY_LOW << i));
 buf_buddy_mem_invalid(buf, i);
 mach_write_to_4(buf->stamp.bytes + BUF_BUDDY_STAMP_OFFSET,
 BUF_BUDDY_STAMP_FREE);

storage/xtradb/buf/buf0buddy.cc

@@ -132,7 +132,7 @@ buf_buddy_stamp_free(
 buf_buddy_free_t*	buf,/*!< in/out: block to stamp */
 ulint	i)/*!< in: block size */
 {
-ut_d(memset(buf, static_cast<int>(i), BUF_BUDDY_LOW << i));
+ut_d(memset(&buf->stamp.bytes, int(i), BUF_BUDDY_LOW << i));
 buf_buddy_mem_invalid(buf, i);
 mach_write_to_4(buf->stamp.bytes + BUF_BUDDY_STAMP_OFFSET,
 BUF_BUDDY_STAMP_FREE);