[asimage] crash with DrawCircle

[ferdymercury]

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Description

https://root-forum.cern.ch/t/timage-drawcircle-cause-core-dump/64784/3

Reproducer

TImage* img = new TASImage();
img->DrawCircle(100, 100, 50, "#FF0000", 10);

and

void show_pict() {
  TImage* img = TASImage::Open("root/documentation/doxygen/images/geom_graf.jpg", TASImage::kJpeg);
  img->DrawCircle(100, 100, 50, "#FF0000", 10);
  img->DrawBox(100, 100, 500, 500, "#FF0000", 10);
  img->Draw();
}

ROOT version

ROOT v6.39.01
Built for linuxx8664gcc on Apr 10 2026, 08:35:45
From heads/asimagecmake@v6-23-01-RF-binSampling-26700-g2b4f2a3cc64
With g++ (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 std201703
Binary directory: /home/huesof/build/build-root_src-Desktop-Debug/bin

Installation method

/

Operating system

/

Additional context

No response

[ferdymercury]

Fixed by #21860