Flashing fails if there are certain special characters in the path

[benlye]

Certain non-ASCII characters (e.g. č) in the path to the firmware file will cause flashing to fail.

C:\Temp\Flash-Multi>.\tools\dfu-util-multi.exe -a 2 -d 1EAF:0003 -D "C:\Temp\MPM priča\multi-stm-serial-aetr-v1.3.1.77.bin" -v
dfu-util-multi 0.7

Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
Copyright 2020 Ben Lye
This program is Free Software and has ABSOLUTELY NO WARRANTY

This version of dfu-util has been modified for flashing an STM32 MULTI-Module. It is intended for use with Flash Multi.
Please report bugs to https://github.com/benlye/dfu-util-multi

Filter on vendor = 0x1eaf product = 0x0003
Opening DFU capable USB device... ID 1eaf:0003
Run-time device DFU version 0110
Found DFU: [1eaf:0003] devnum=0, cfg=1, intf=0, alt=2, name="STM32duino bootloader v1.0  Upload to Flash 0x8002000"
Claiming USB DFU Interface...
Setting Alternate Setting #2 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 1024
C:\Temp\MPM prica\multi-stm-serial-aetr-v1.3.1.77.bin: No such file or directory

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