fix bug with reading multiple blocks

pointer arithmatic got me again, I need to add 512*16 bits
since buf is a 16 bit type.

kernel/Filesystem/ext2.c

@@ -52,7 +52,7 @@ uint32_t ext2_read_data(uint32_t inode_num, uint32_t count, uint16_t* buf)
 	for (i = 0; i < 12 && blocks_left != 0; i++) {
 		if (!inode.block_pointer[i])
 			break;
-		ata_read_sectors(ATA_MASTER, ext2_base + inode.block_pointer[i] * 2, 2, buf + i * 1024);
+		ata_read_sectors(ATA_MASTER, ext2_base + inode.block_pointer[i] * 2, 2, buf + i * 512);
 		blocks_left--;
 	}