BUG: Set FastMarching targets prior to reach mode

With updates to FastMarching in ITK, it is necessary to
SetTargetPoints prior to setting TargetReachMode.

Without this change, an exception is thrown in
itkFastMarchingUpwindGradientImageFilter::
VerifyTargetReachedModeConditions() when called by
SetTargetReachedModeToAllTargets()
which is called by itkSpeedfunctionToPathFilter::
ComputeArrivalFunction()

Author: aylward

include/itkSpeedFunctionToPathFilter.hxx

@@ -67,7 +67,6 @@ SpeedFunctionToPathFilter<TInputImage, TOutputPath>::ComputeArrivalFunction()
   marching->SetInput(speed);
   marching->SetGenerateGradientImage(false);
   marching->SetTargetOffset(2.0 * Superclass::m_TerminationValue);
-  marching->SetTargetReachedModeToAllTargets();
 
   // Add next and previous front sources as target points to
   // limit the front propagation to just the required zones
@@ -102,6 +101,8 @@ SpeedFunctionToPathFilter<TInputImage, TOutputPath>::ComputeArrivalFunction()
   }
   marching->SetTargetPoints(targets);
 
+  marching->SetTargetReachedModeToAllTargets();
+
   // Get the next Front source point and add as trial point
   typename NodeContainer::Pointer trial = NodeContainer::New();
   trial->Initialize();