Fix crash when setting text-inactive-pixel in rcfile

[lambdadog]

Prior to fix:

[lambdadog@taiga:~/devel/worm]$ DISPLAY=:1 ./worm
19:40:33 | INFO | wm.nim:35 | Opened display
19:40:33 | INFO | worm.nim:25 | config file found, loading...
19:40:33 | INFO | worm.nim:27 | config file loaded!
19:40:33 | INFO | clientmessage.nim:211 | Chaging text inactive pixel to -16777216
/home/lambdadog/devel/worm/src/worm.nim:29 worm
/home/lambdadog/devel/worm/src/events.nim:36 eventLoop
/home/lambdadog/devel/worm/src/events.nim:28 dispatchEvent
/home/lambdadog/devel/worm/src/events/clientmessage.nim:213 handleClientMessage
/nix/store/k66ff7hq2g0zllyjdv6ll1w8m18h38xj-nim-unwrapped-1.6.4/nim/lib/pure/options.nim:222 get
Error: unhandled exception: Can't obtain a value from a `none` [UnpackDefect]

[codic12]

thanks!

[lambdadog]

@codic12 did you mean to merge this?

[codic13]

I did, but I got locked out of my github account apparently... will merge when I get access back.