WebP: Decoding makes the entire image look green

[zly2006]

Describe the bug
A clear and concise description of what the bug is.

Version information

1. The version of the TwelveMonkeys ImageIO library in use.

com.twelvemonkeys.imageio:imageio-webp:3.12.0

2. The exact output of java --version (or java -version for older Java releases).
   For example:

openjdk 23.0.2 2025-01-21
OpenJDK Runtime Environment Homebrew (build 23.0.2)
OpenJDK 64-Bit Server VM Homebrew (build 23.0.2, mixed mode, sharing)

Example code

    val z = ImageIO.read(File("sofa.webp"))
    // to png
    ImageIO.write(z, "png", File("sofa.png"))

Sample file(s)

original webp & decoded png.zip

decoded png:

[haraldk]

Looks like a duplicate of #734