Crash when trying to change color theme inside the tutorial

[theoratkin]

Steps to reproduce:

1. Open tutorial.
2. Go to settings.
3. Try several different color themes.
4. The program will crash.

I'm running the latest git version of the program on Arch Linux.

This is the contents of log.txt file after crash (home directory path replaced with ...):

2020/11/12 01:16:35 

# ERROR #
2020/11/12 01:16:35 
.../masterplan/src/masterplan/main.go:80
2020/11/12 01:16:35  | Error: runtime error: index out of range [0] with length 0
2020/11/12 01:16:35 
/usr/lib/go/src/runtime/panic.go:969
2020/11/12 01:16:35 
/usr/lib/go/src/runtime/panic.go:88
2020/11/12 01:16:35 
.../go/pkg/mod/github.com/solarlune/raylib-go@v0.0.0-20201012173321-c86364b3c299/raylib/textures.go:143
2020/11/12 01:16:35 
.../masterplan/src/masterplan/whiteboard.go:296
2020/11/12 01:16:35 
.../masterplan/src/masterplan/task.go:2242
2020/11/12 01:16:35 
.../masterplan/src/masterplan/board.go:602
2020/11/12 01:16:35 
.../masterplan/src/masterplan/project.go:1341
2020/11/12 01:16:35 
.../masterplan/src/masterplan/project.go:1754
2020/11/12 01:16:35 
.../masterplan/src/masterplan/project.go:2160
2020/11/12 01:16:35 
.../masterplan/src/masterplan/main.go:309
2020/11/12 01:16:35 
/usr/lib/go/src/runtime/proc.go:204
2020/11/12 01:16:35 
/usr/lib/go/src/runtime/asm_amd64.s:1374
2020/11/12 01:16:35 

# ERROR #

[SolarLune]

Hello~ That commit should resolve the issue. Sorry for the late reply, and thanks for reporting!

[theoratkin]

Yes, I can verify that it's fixed. Great job!

[SolarLune]

Thanks! Glad to hear it's fixed.