Fixed a crash when the window is resized #8
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Repro: run in a tiling window manager? probably other ways to repro
Root cause: DrawArea initialised with config file dimensions, parameters copied to RenderHandler, DrawArea is updated afterwards in SetSize (by window manager?), but the new dimensions aren't known by RenderHandler because they were copied earlier. So just changing RenderHandler to have a pointer to DrawArea instead of a copy should make it know resizes. I didn't see any code paths where the DrawArea (or its parent structs) get recreated, so it shouldn't have any lifetime issues.
If you think there's a better way to fix it, just leave me a comment, I'll change it to whatever you like.
Not extensively tested yet, I have other work on this to get it to work in wayland/wlroots still.