[BUG] Generic Ubuntu logo when `XDG_CONFIG_DIRS` is not set for Ubuntu flavor (at least Rhino Linux)

[osalbahr]

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Description

Ubuntu flavor detection is broken in the Rhino Linux container (ghcr.io/rhino-linux/docker) when XDG_CONFIG_DIRS is not set (it's not set by default). Is this expected behavior?

I did some investigation (spamming puts), and the culprit is here:

fastfetch/src/detection/os/os_linux.c

Lines 64 to 66 in de92296

	const char* xdgConfigDirs = getenv("XDG_CONFIG_DIRS");
	if(!ffStrSet(xdgConfigDirs))
	return;

(I don't actually use Rhino Linux, just something I noticed and thought I'd point it out)

Version used

fastfetch 2.52.0-30 (aarch64)

Bug prevalence

Always

Regression

Not sure

Installation

Built from source

Package manager

No response

Screenshots

Configuration

Image protocol

I don't know

Terminal

Terminal (macOS)

Image tried

N/A

Error message

No response

Features built-in

threads
libzfs
linux/videodev2
linux/wireless

[osalbahr]

I'll draft a PR moving the if statement down a bit (I only thought of this after creating the issue).