Function FileSize

NULLC/includes/file.cpp:180–192

		return ftell(file->handle);
	}
	long long FileSize(File* file)
	{
		if(!file->handle)
		{
			nullcThrowError("Cannot get size of a closed file.");
			return 0;
		}
		long pos = ftell(file->handle);
		fseek(file->handle, SEEK_END, 0);
		long res = ftell(file->handle);
		fseek(file->handle, SEEK_SET, pos);
		return res;
	}
	void FileReadArr(NULLCArray arr, unsigned offset, unsigned count, File* file)
	{
		if(!file->handle)