correct a forgotten virtual keyword

git-svn-id: svn+ssh://svn.in2p3.fr/class@466 0e7d625b-0364-4367-a6be-d5be4a48d228

source/branches/CLASSV3/Model/Irradiation/IM_Matrix.hxx

@@ -47,7 +47,7 @@ class IM_Matrix : public IrradiationModel
 	 \param IsotopicVector IV isotopic vector to irradiate
 	 \param EvolutionData XSSet set of corss section to use to perform the evolution calculation
 	 */
-	EvolutionData GenerateEvolutionData(IsotopicVector IV, EvolutionData XSSet, double Power, double cycletime);
+	virtual EvolutionData GenerateEvolutionData(IsotopicVector IV, EvolutionData XSSet, double Power, double cycletime);
 	//}
 
 

source/branches/CLASSV3/Model/Irradiation/IM_RK4.hxx

@@ -48,7 +48,7 @@ class IM_RK4 : public IrradiationModel, DynamicalSystem
 	 \param IsotopicVector IV isotopic vector to irradiate
 	 \param EvolutionData XSSet set of corss section to use to perform the evolution calculation
 	 */
-	EvolutionData GenerateEvolutionData(IsotopicVector IV, EvolutionData XSSet, double Power, double cycletime);
+	virtual EvolutionData GenerateEvolutionData(IsotopicVector IV, EvolutionData XSSet, double Power, double cycletime);
 	//}
 
 	//********* RK4 Method *********//