This fixes `gcc-13` build failure on `master` as
https://hydra.nixos.org/build/249142729:
In file included from /build/source/extern/Pomme/src/PommeDebug.cpp:1:
/build/source/extern/Pomme/src/PommeDebug.h:21:34: error: 'uint32_t' was not declared in this scope
21 | std::string FourCCString(uint32_t t, char filler = '?');
| ^~~~~~~~