fix IWAD search path issues on platforms other that Windows and macOS

bradharding / doomretro

The classic, refined DOOM source port. For Windows PC.

https://www.doomretro.com

GNU General Public License v3.0

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Closed bubbleguuum closed 3 months ago

bubbleguuum commented 3 months ago

IWAD search was not working properly undercertain conditions:

DirIsFile: returning true with arguments path="/usr/share/doom" filename="doom", which is bogus. Now check if directory really points to a wad file.
M_FileCaseExists: did not work properly when the first trivial test is false

bradharding commented 3 months ago

Thank you so much @bubbleguuum!