Function getStreamChecked

src/piper.js:2136–2142

(fd)

				throw new FS.ErrnoError(33);
			},
			getStreamChecked(fd) {
				var stream = FS.getStream(fd);
				if (!stream) {
					throw new FS.ErrnoError(8);
				}
				return stream;
			},
			getStream: (fd) => FS.streams[fd],
			createStream(stream, fd = -1) {
				if (!FS.FSStream) {