Kage: if-none condition

[tinne26]

Ebitengine Version

v2.7.3

Operating System

• Windows
• macOS
• Linux
• FreeBSD
• OpenBSD
• Android
• iOS
• Nintendo Switch
• PlayStation 5
• Xbox
• Web Browsers

Go Version (go version)

go1.22.2

What steps will reproduce the problem?

//kage:unit pixels
package main

func Fragment(_ vec4, sourceCoords vec2, _ vec4) vec4 {
	const Red = false
	if Red {
		return vec4(1, 0, 0, 1)
	} else {
		return imageSrc0At(sourceCoords)
	}
}

What is the expected result?

Shader compiles.

What happens instead?

Panic:

6:2: if-condition must be bool but: none

Anything else you feel useful to add?

I've seen #2797, but this is not exactly the same, and it's happening on v.2.7.3.

Notice that using a bool directly (or 0 == 0, as in the previous issue) instead of the constant does work correctly.