expected-exception pattern -- let's do away with that

[BrannonKing]

This code from the glTF importer uses the expected exception pattern:

bool glTFImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /* checkSig */) const {
    Asset asset(pIOHandler);
    try {
        asset.Load(pFile,
                   CheckMagicToken(
                       pIOHandler, pFile, AI_GLB_MAGIC_NUMBER, 1, 0,
                       static_cast<unsigned int>(strlen(AI_GLB_MAGIC_NUMBER))));
        return asset.asset;
    } catch (...) {
        return false;
    }
}

When loading glb files, the importer::ReadFile apparently has to try several times before it finds the right import handler. These exceptions always get caught by and pause the debugger, which is an annoyance. (I usually use the clang debugger.)

[kimkulling]

I do agree, this makes no sense. I will change that.