[PATCH] try to avoid false positives on FAT filesystem

[Felix Zielcke]

Here's a little patch to check if
bpb.version_specific.fat12_or_fat16.fstype or
bpb.version_specific.fat32.fstype has the string FAT12/FAT16/FAT32
As can be seen on [0] and [1] Dell PCs have a small FAT partition
containing some utilities.
It seems like mkfs.ext2 isn't always clearing the first 512 bytes.
Good for us is that fstype is set to .AT16 on these Dell partitions, so
it can be easily avoided.
Are there any objections?

[0] http://bugs.debian.org/514263
[1] http://bugs.debian.org/505137
-- 
Felix Zielcke