Correct type comparison

Author: arahlin

core/src/G3MultiFileWriter.cxx

@@ -86,7 +86,7 @@ G3MultiFileWriter::CheckNewFile(G3FramePtr frame)
 	if (stream_) {
 		bool start_new_ = false;
 
-		if (stream_.tellp() > size_limit_)
+		if (stream_.tellp() > std::streamoff(size_limit_))
 			start_new_ = true;
 
 		if (newfile_callback_.ptr() != Py_None &&