CLSA-2025-1762544876 Fix CVE(s): CVE-2025-55004

SECURITY UPDATE: heap-buffer overflow read in MNG - debian/patches/CVE-2025-55004.patch: Fix heap buffer overflow issue in MNG magnification with alpha channel - debian/patches/fix-missing-cast-function.patch: Fix missing CastDoubleToLong function failing build - CVE-2025-55004...