Fix nullref

stefannikolei · stefannikolei · commit df803cd34de6 · 2023-02-01T07:39:36.000+01:00
the quantizier was initialized with default --&gt; all properties are null. So we need to check that
diff --git a/src/ImageSharp/Formats/Gif/GifEncoderCore.cs b/src/ImageSharp/Formats/Gif/GifEncoderCore.cs
@@ -171,7 +171,10 @@ private void EncodeFrames<TPixel>(
             quantized = null;
         }
 
-        paletteQuantizer.Dispose();
+        if (hasPaletteQuantizer)
+        {
+            paletteQuantizer.Dispose();
+        }
     }
 
     private void EncodeFrame<TPixel>(

Original file line number	Diff line number	Diff line change
`@@ -171,7 +171,10 @@ private void EncodeFrames<TPixel>(`
`171`	`171`	`quantized = null;`
`172`	`172`	`}`
`173`	`173`
`174`		`- paletteQuantizer.Dispose();`
	`174`	`+ if (hasPaletteQuantizer)`
	`175`	`+ {`
	`176`	`+ paletteQuantizer.Dispose();`
	`177`	`+ }`
`175`	`178`	`}`
`176`	`179`
`177`	`180`	`private void EncodeFrame<TPixel>(`