Freeze while importing some fonts

[MathemanFlo]

ArmorPaint version: ArmorPaint.org - v0.9 (2021-10-05) - bd87056 Windows - Direct3D11

Issue description: ArmorPaint freezes while importing fonts like Wingdings oder Webdings. It also happens if I import the whole Calibri font family

Steps to reproduce:

1. Go to C:\Windows\Fonts
2. Drag and drop Wingdings or Webdings to ArmorPaint
3. ArmorPaint freezes

[shiena]

The reason for the freeze is probably that Wingdings and Webdings do not include the glyph "Abg" for preview.

[MathemanFlo]

The reason for the freeze is probably that Wingdings and Webdings do not include the glyph "Abg" for preview.

I also thought that this is the case but I doubt it, because it also happens for Calibri, which is a "normal" font family and Webdings/Wingdings contains glyphs for A,b and g but they are symbols like a bike in case of b in Webdings.

[MathemanFlo]

Some additional details

• 1. Load Webdings (it's a windows font)
• 2. stderr contains:

RangeError: Start offset undefined is outside the bounds of the buffer
    at new Uint8Array (<anonymous>)
    at new haxe_io_Bytes (<anonymous>:4560:12)
    at Function.alloc (<anonymous>:4528:23)
    at kha_Font._get (<anonymous>:47109:23)
    at kha_Font.width (<anonymous>:47126:15)
    at Function.makeFontPreview (<anonymous>:14836:21)
    at <anonymous>:24799:26
    at update (<anonymous>:5717:7)
    at kha_TimeTask.task (<anonymous>:5430:4)
    at Function.executeTimeTasks (<anonymous>:5359:76)

Thus it is probably a kha bug.