CLSA-2026-1777394739 ImageMagick: Fix of 2 CVEs

CVE-2026-33900: integer truncation/wraparound in the viff encoder that could trigger an out-of-bounds heap write on 32-bit builds GHSA-v67w-737x-v2c9; upstream b6c01a5a23f1e350ebe2db78c7cc326db2e320c9 - CVE-2026-33905: out-of-bounds read in SampleImage when sample:offset is set via -sample define...