bug #33345: File auto detection as binary doesn't open
file in binary mode on Windows
* fileio.c: Move the decision about opening files in
binary mode until before the fopen() call.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@964 81a1dc3b-b13d-400b-aceb-764788c761c2