Fix GCC 11.2.0 -m32 (IA-32) warnings

page_create_low(): Fix -Warray-bounds

log_buffer_extend(): Fix -Wstringop-overflow

storage/innobase/log/log0log.cc

@@ -79,10 +79,8 @@ void log_buffer_extend(ulong len)
 	const size_t new_buf_size = ut_calc_align(len, srv_page_size);
 	byte* new_buf = static_cast<byte*>
 		(ut_malloc_dontdump(new_buf_size, PSI_INSTRUMENT_ME));
-	TRASH_ALLOC(new_buf, new_buf_size);
 	byte* new_flush_buf = static_cast<byte*>
 		(ut_malloc_dontdump(new_buf_size, PSI_INSTRUMENT_ME));
-	TRASH_ALLOC(new_flush_buf, new_buf_size);
 
 	mysql_mutex_lock(&log_sys.mutex);
 

storage/innobase/page/page0page.cc

@@ -283,7 +283,7 @@ void page_create_low(const buf_block_t* block, bool comp)
 	compile_time_assert(PAGE_BTR_IBUF_FREE_LIST_NODE + FLST_NODE_SIZE
 			    <= PAGE_DATA);
 
-	page = buf_block_get_frame(block);
+	page = block->frame;
 
 	fil_page_set_type(page, FIL_PAGE_INDEX);