Use doubles instead of floats for the time argument in Source:seek. This probably won't affect anything meaningfully, but in theory it's more precise.

src/modules/sound/lullaby/FLACDecoder.cpp

@@ -78,9 +78,9 @@ int FLACDecoder::decode()
 	return bufferSize;
 }
 
-bool FLACDecoder::seek(float s)
+bool FLACDecoder::seek(double s)
 {
-	return seek_absolute((int)(s*1000.0f));
+	return seek_absolute((int)(s*1000.0));
 }
 
 bool FLACDecoder::rewind()