[Output] Special handling for lambda = 0

src/fixedpointiterator.cc

@@ -72,7 +72,8 @@ FixedPointIterator<Factory, StateUpdater, VelocityUpdater, ErrorNorm>::run(
     ScalarVector newAlpha;
     stateUpdater->extractAlpha(newAlpha);
 
-    if (errorNorm_.diff(alpha, newAlpha) < fixedPointTolerance_) {
+    if (lambda_ < 1e-12 or
+        errorNorm_.diff(alpha, newAlpha) < fixedPointTolerance_) {
       fixedPointIteration++;
       break;
     }