workaround the freeze of debian wheezy during installation

Workaround
=========
The bug possibly seems to be in /bin/check-missing-firmware which is
called by /bin/ethdetect

I performed the following Installer commands as a workaround
$ Advanced options/Expert install
$ "Execute a shell"
$ nano /bin/check-missing-firmware
Inserted “exit 0” directly after “#!/bin/sh” line
Save file
$ exit
I then ran the Installer steps as normal and the whole installation
proceeded perfectly fine. Since then Debian Wheezy has running fine
and I am able to perform daily tasks and connect to the internet as
normal ie. the workaround has so far not hindered the daily usage.

Info
===
It seems like a similar bug exists here since Debian Lenny