stb_vorbis: Add missing error checks in comment reading mallocs
stb_vorbis: Add missing error checks in comment reading mallocs

Backported from https://github.com/nothings/stb/pull/989.

Fixes #40164.

(cherry picked from commit 24a01c0d396a77473cae1b85354cb3d1a03732cb)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot