CTextureBoo: Make use of anonymous namespace
CTextureBoo: Make use of anonymous namespace

Makes some helper functions have internal linkage, silencing some
-Wmissing-declarations warnings, and also allows preventing ODR
violations from ever occurring with the RGBA8 and DXT1Block structs.

AxioDL/PathShagged,AxioDL/PathShagged,AxioDL/PathShagged