Eeschema sim dialog: Fix kicad crash/hang when spice model is corrupted

From master branch, commit b06727d2

eeschema/dialogs/dialog_sim_model.cpp

@@ -836,12 +836,26 @@ bool DIALOG_SIM_MODEL<T_symbol, T_field>::loadLibrary( const wxString& aLibraryP
 
     wxArrayString modelNames;
 
+    bool modelNameExists = false;
+
     for( const auto& [name, model] : library()->GetModels() )
+    {
         modelNames.Add( name );
 
+        if( name == modelName )
+            modelNameExists = true;
+    }
+
     m_modelNameChoice->Clear();
     m_modelNameChoice->Append( modelNames );
 
+    if( !modelNameExists )
+    {
+        m_infoBar->ShowMessage(
+                wxString::Format( _( "No model named '%s' in '%s'." ), modelName, aLibraryPath ) );
+        return false;
+    }
+
     if( isIbisLoaded() )
     {
         wxArrayString emptyArray;