On Windows, file dialogs display extension filters followed by a ';'

[hfmrow]

On Windows, file dialogs display extension filters followed by a ';' even when it's not necessary.

before:

after:

• A simple fix for file dialog handling on Windows regarding extension filters.

I hope this is more understandable.

[ncruces]

Much clearer thanks! I could understand the goal, but not the fix.

This was actually a memory bug, as I was removing a needed null terminator.
Hope you don't mind the change, it's clearer for me.

I'll merge but I'd appreciate you testing before I tag a new release.

[hfmrow]

I also appreciate clarity. I must admit that a few years have passed since my last PR, and I simply pushed my changes without considering the need for a thorough analysis.

Regarding the tests, they were carried out, and everything works correctly. Your way of fixing the issue is better than mine. I applied a patch for the visual aspect, and due to my lack of knowledge of your code, I didn’t deeply investigate the root cause of the issue. But indeed, string termination in C is done with '0', and if it's missing, it can cause serious problems.

My usage of your library

I use your library because I’m using 'fyne' to generate the graphical interface for my applications. It’s very convenient for me since it’s cross-platform and works on both Android and iOS. However, the 'fyne' file explorer is quite limited on Windows and Linux. So, I made a wrapper that allows the use of the native OS file explorers while keeping the 'fyne' logic for file management, all thanks to your work. By the way, thank you for that.

Best regards, hfmrow.

[ncruces]

Sorry, took me a while to tag. Done.