This is what you get for using tabs. You deserve it. ;-)
Seriously, I found this really annoying when I did the patch because almost
everything else in qemu has four spaces and I needed to change my editor
settings for just this file. But I still left indentation on four characters,
so this line did fit for me.
I can either send a second version of the patch which fixes this line, or we
could have a patch which changes the indentation of the whole file to four
spaces (as specified in the coding style document). qemu-io might be new
enough to not destroy valuable svn blame information with such a patch.