Fix error messages for linear solver

Belonging to [master]:
  - #2162

Author: rfranke

Compiler/Template/CodegenCpp.tpl

@@ -9664,7 +9664,7 @@ template equationString(SimEqSystem eq, Context context, Text &varDecls, SimCode
               }
               catch (ModelicaSimulationError& ex)
               {
-                string error = add_error_info("Nonlinear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
+                string error = add_error_info("Linear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
                 throw ModelicaSimulationError(ALGLOOP_EQ_SYSTEM, error);
               }
               >>
@@ -9714,7 +9714,7 @@ template equationString(SimEqSystem eq, Context context, Text &varDecls, SimCode
                        }
                        catch (ModelicaSimulationError& ex)
                        {
-                         string error = add_error_info("Nonlinear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
+                         string error = add_error_info("Linear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
                          throw ModelicaSimulationError(ALGLOOP_EQ_SYSTEM,error);
                        }
                 }
@@ -11327,7 +11327,7 @@ template equationLinearOrNonLinear(SimEqSystem eq, Context context,Text &varDecl
            }
            catch(ModelicaSimulationError&  ex)
            {
-             string error = add_error_info("Nonlinear solver", ex.what(), ex.getErrorID(), _simTime);
+             string error = add_error_info("Linear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
              throw ModelicaSimulationError(ALGLOOP_EQ_SYSTEM,error);
            }
            >>
@@ -11378,7 +11378,7 @@ template equationLinearOrNonLinear(SimEqSystem eq, Context context,Text &varDecl
               }
               catch(ModelicaSimulationError& ex)
               {
-                string error = add_error_info("Nonlinear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
+                string error = add_error_info("Linear solver <%ls.index%>", ex.what(), ex.getErrorID(), _simTime);
                 throw ModelicaSimulationError(ALGLOOP_EQ_SYSTEM,error);
               }
           }