fixed: quell signed/unsigned comparison warning

opm/autodiff/StandardWell_impl.hpp

@@ -331,7 +331,7 @@ namespace Opm
             return primary_variables_evaluation_[GFrac];
         }
 
-        if (has_solvent && compIdx == contiSolventEqIdx) {
+        if (has_solvent && compIdx == (unsigned)contiSolventEqIdx) {
             return primary_variables_evaluation_[SFrac];
         }
 

tutorials/sim_tutorial1.cpp

@@ -87,7 +87,9 @@ try
     /// We open an output file stream for the output
     /// \snippet tutorial1.cpp output stream
     /// \internal [output stream]
+#ifdef DISABLE_OUTPUT
     std::ofstream vtkfile("tutorial1.vtu");
+#endif
     /// \internal [output stream]
     /// \endinternal
     /// \page tutorial1