TEXTUREx editor multiple issues both on Linux and Windows

[jmfergeau]

SLADE Version

3.2.5, 3.2.6

OS

Windows, Linux

Editor

Resource editor

Steps to Reproduce and Observed Behavior

1. Open a wad or a folder
2. Double-click on a texture lump
3. On Linux, Two things might happen. Slade might just abruptly crash and close with no errors. Or if it didn't crash, the editor will work as intended but the graphical part where you can drag the elements to set the offset will not display anything. It will just display what was behind it before (or just a pitch black window) and will not be usable at all. On Windows, it doesn't crash, but the graphical part is not usable either, displaying this time a pitch red window instead.

Expected Behavior

the Texturex editor should display the window editor correctly and be fully interactive

NOTE: For the crash on linux, I found a workaround. Very weird, but it works:

1. Open slade and open a wad or folder
2. Open a map with the map editor
3. Grab a linedef and attempt to click the special menu to change it
4. An error dialog will appear. Uncheck the "show dialog next time" and click continue
5. Cancel the special change and close the map editor
6. Double-click the TEXTURE lump. No more crash.

Sorry if it has already been posted. I checked everywhere but haven't found anything similar.

Screenshots