removed compiler warnings

Former-commit-id: 48647056

code/include/fluxes/laxfriedrichsflux.h

@@ -5,7 +5,7 @@
 
 class LaxFriedrichsFlux : public NumericalFlux
 {
-    double _dt;
+    // double _dt;
 
   public:
     /**

code/include/solvers/mnsolver.h

@@ -72,6 +72,6 @@ class MNSolver : public SolverBase
 
     // Helper
     /*! @brief Computes the radiative flux from the solution vector of the moment system */
-    void ComputeRadFlux();
+    void ComputeRadFlux() override;
 };
 #endif    // MNSOLVER_H

code/include/solvers/pnsolver.h

@@ -54,7 +54,7 @@ class PNSolver : public SolverBase
     void IterPostprocessing( unsigned idx_pseudotime ) override;
 
     // Helper
-    void ComputeRadFlux();
+    void ComputeRadFlux() override;
 
     // Initialization of the Solver
     /*! @brief parameter functions for setting up system matrix

code/include/solvers/snsolver.h

@@ -33,7 +33,7 @@ class SNSolver : public SolverBase
     void virtual IterPostprocessing( unsigned idx_pseudotime ) override;
 
     // Helper
-    void ComputeRadFlux();
+    void ComputeRadFlux() override;
 
     // --- Member variables ---
 };

code/src/common/config.cpp

@@ -694,7 +694,7 @@ bool Config::TokenizeString( string& str, string& option_name, vector<string>& o
     pos = str.find( "=" );
     if( pos == string::npos ) {
         string errmsg = "Error in Config::TokenizeString(): line in the configuration file with no \"=\" sign.  ";
-        errmsg += "\nLook for: \n  str.length() = " + str.length();
+        errmsg += "\nLook for: \n  str.length() = " + std::to_string(str.length());
         spdlog::error( errmsg );
         throw( -1 );
     }

code/src/common/io.cpp

@@ -197,7 +197,8 @@ Mesh* LoadSU2MeshFromFile( const Config* settings ) {
                         getline( ifs, line );
                         if( line.find( "MARKER_TAG", 0 ) != std::string::npos ) {
                             markerTag    = line.substr( line.find( "=" ) + 1 );
-                            auto end_pos = std::remove_if( markerTag.begin(), markerTag.end(), isspace );
+                            auto end_pos = std::remove_if(
+                                markerTag.begin(), markerTag.end(), []( char c ) { return std::isspace( static_cast<unsigned char>( c ) ); } );
                             markerTag.erase( end_pos, markerTag.end() );
                             btype = settings->GetBoundaryType( markerTag );
                             if( btype == BOUNDARY_TYPE::INVALID ) {