http://bugs.winehq.org/show_bug.cgi?id=10284
--- Comment #4 from Jonathan echidnaman@gmail.com 2007-11-10 12:24:34 --- Actually, I think it's OFN_ENABLESIZING. I think you miscounted your zeros. ;) I found a list online that said that it was OFN_ENABLESIZING.
I also looked through the No$gba changelog since I remember him adding resizing to the emulator. The version before where he implements OFN_ENABLESIZING (2.4b) doesn't give the fixme. So this fixme is related to a totally different bug.