ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths
In `ReadSTEGANOImage()` (`coders/stegano.c`), the `watermark` Image object is not freed on three early-return paths, resulting in a definite memory leak (~13.5KB+ per invocation) that can be exploited for denial of service.
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Direct leak of 13512 byte(s) in 1 object(s) allocated from: