minix: bug widening a binary "not" operation

"chunk_size" is an unsigned int and "pos" is an unsigned long. The
"& ~(chunk_size-1)" operation clears the high 32 bits unintentionally.

The ALIGN() macro does the correct thing.

Signed-off-by: Dan Carpenter <[e-mail]>
Cc: Al Viro <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

fs/minix/dir.c

···
 	unsigned offset;
 	unsigned long n;
 
-	ctx->pos = pos = (pos + chunk_size-1) & ~(chunk_size-1);
+	ctx->pos = pos = ALIGN(pos, chunk_size);
 	if (pos >= inode->i_size)
 		return 0;