libwmf 0.2.16

What's Changed

• many parsing and resource handling corrections in the player
• eight Coverity reports resolved
• new wmf_gd_get_image_pixels(), and support for the current system libgd
• symbols exported for Windows and MSYS2 builds
• macOS 26 build fixed
• a fuzzer added, and wider test coverage
• zlib and png found through pkg-config, pixbuf can be disabled on its own

Full Changelog: v0.2.15...v0.2.16