Crash when removing JSFX while reload dialog is active (FIXED)

[Tale]

REAPER v5.32+ (and maybe older versions as well) will crash if you remove a JSFX plug-in while the "Reload JS Effect?" dialog is active. Tested on Win10 Pro x64 with both 32 and 64-bit REAPER.

Steps to reproduce:

1. Add JSFX.
2. Click "Edit".
3. Edit JSFX externally.
4. Ignore "Reload JS Effect?" message box.
5. Remove JSFX => Crash!

I guess the owner window is gone, and the message box doesn't like that or something.

Of course a workaround is to simply not do this, but sometimes this accidentally happens to me nevertheless...

BTW, I don't think that this can happen on OSX, because there the "Reload JS Effect?" dialog seems to be system modal.

[Justin]

Fixing -- WDL_DestroyCheck yay. Also could get it to crash by using the close button and getting multiple "save changes?" boxes up...

[Tale]

Great, thanks!