Merged requested to merge tpm/gst-plugins-good:good-g-memdup2 into master
- png: alloc size variable is a png type that's always 32-bit
- vpx: alloc size based on existing allocation
- wavpack: alloc size based on existing allocation
g_memdup() is deprecated since GLib 2.68 and we want to avoid deprecation warnings with recent versions of GLib.
flv: ignore, source file unused
wavparse: !994 (merged)