v2.3.0 load ttc font file error

[chindev2012]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

2022/12/28 14:09:20 Fyne error: font load error
2022/12/28 14:09:20 Cause: unsupported font format
2022/12/28 14:09:20 At: C:/Users/xxx/go/pkg/mod/fyne.io/fyne/[email protected]/internal/painter/font.go:150
panic: runtime error: invalid memory address or nil pointer dereference

How to reproduce

Install fyne v2.3.0
Use code from example

Screenshots

No response

Example code

package main

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/widget"
	"os"
)

func init(){
	os.Setenv("FYNE_FONT", "C:\\windows\\fonts\\msyh.ttc")
}

func main() {
	a := app.New()
	w := a.NewWindow("demo")
        w.Resize(fyne.Size{300, 200})
	w.CenterOnScreen()
	w.SetContent(widget.NewLabel("Hello World!"))
	w.ShowAndRun()
}

Fyne version

2.3.0

Go compiler version

1.19.3

Operating system

Windows

Operating system version

Windows 11 22H2 Build 22621.963

Additional Information

No response

[andydotxyz]

Seems like a dupe of #3245 - we only support .ttf at this time.