COMP: issue with enum SampleStrategy on gcc 4.1

Modules/Applications/AppClassification/app/otbTrainImagesClassifier.cxx

@@ -146,7 +146,7 @@ public:
 //      {
       ComputePolygonStatistics( imageList, vectorFileList, fileNames.polyStatTrainOutputs );
       ComputeSamplingRate( fileNames.polyStatTrainOutputs, fileNames.rateTrainOut, rates.fmt );
-      SelectAndExtractTrainSamples( fileNames, imageList, vectorFileList, SamplingStrategy::CLASS );
+      SelectAndExtractTrainSamples( fileNames, imageList, vectorFileList, Superclass::CLASS );
 //      }
 //    else // Select training samples base on geometric sampling if no input vector is provided
 //      {
@@ -224,4 +224,4 @@ private :
 } // end namespace Wrapper
 } // end namespace otb
 
-OTB_APPLICATION_EXPORT( otb::Wrapper::TrainImagesClassifier )
\ No newline at end of file
+OTB_APPLICATION_EXPORT( otb::Wrapper::TrainImagesClassifier )

Modules/Applications/AppClassification/include/otbTrainImagesBase.h

@@ -62,10 +62,10 @@ public:
 
 protected:
 
-  enum SamplingStrategy
+  typedef enum
   {
     CLASS, GEOMETRIC
-  };
+  } SamplingStrategy;
   struct SamplingRates;
   class TrainFileNamesHandler;
 

Modules/Applications/AppClassification/include/otbTrainImagesBase.txx

@@ -335,7 +335,7 @@ void TrainImagesBase::SelectAndExtractValidationSamples(const TrainFileNamesHand
     {
     SelectAndExtractSamples( imageList->GetNthElement( i ), validationVectorFileList[i],
                              fileNames.sampleValidOutputs[i], fileNames.polyStatValidOutputs[i],
-                             fileNames.ratesValidOutputs[i], SamplingStrategy::CLASS );
+                             fileNames.ratesValidOutputs[i], Self::CLASS );
     }
 }