Fix return of parameter registration functions

Author: jbreue16

src/libcadet/model/parts/ParticleDiffusionOperatorDG.cpp

@@ -2357,10 +2357,10 @@ namespace parts
 		if (multiplexTypeParameterValue(pId, hashString("PAR_POROSITY"), _singleParPorosity, _parPorosity, value, nullptr))
 			return true;
 
-
-
 		if (model::setParameter(pId, value, _parDepSurfDiffusion, _singleParDepSurfDiffusion))
 			return true;
+
+		return false;
 	}
 
 	bool ParticleDiffusionOperatorDG::setParameter(const ParameterId& pId, int value)
@@ -2389,10 +2389,10 @@ namespace parts
 		if (multiplexTypeParameterValue(pId, hashString("PAR_POROSITY"), _singleParPorosity, _parPorosity, value, &sensParams))
 			return true;
 
-
-
 		if (model::setSensitiveParameterValue(pId, value, sensParams, _parDepSurfDiffusion, _singleParDepSurfDiffusion))
 			return true;
+
+		return false;
 	}
 
 	bool ParticleDiffusionOperatorDG::setSensitiveParameter(std::unordered_set<active*>& sensParams, const ParameterId& pId, unsigned int adDirection, double adValue)
@@ -2433,6 +2433,7 @@ namespace parts
 			return true;
 		}
 
+		return false;
 	}