Make sure python is not required on startup (Windows)

src/searchengine/searchengine.cpp

@@ -99,7 +99,11 @@ SearchEngine::SearchEngine(MainWindow *parent) : QWidget(parent), mp_mainWindow(
   connect(searchTimeout, SIGNAL(timeout()), this, SLOT(on_search_button_clicked()));
   // Update nova.py search plugin if necessary
   updateNova();
-  supported_engines = new SupportedEngines();
+  supported_engines = new SupportedEngines(
+      #ifdef Q_WS_WIN
+        has_python
+      #endif
+        );
   // Fill in category combobox
   fillCatCombobox();
   connect(search_pattern, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(displayPatternContextMenu(QPoint)));

src/searchengine/supportedengines.h

@@ -105,8 +105,9 @@ signals:
   void newSupportedEngine(QString name);
 
 public:
-  SupportedEngines() {
-    update();
+  SupportedEngines(bool has_python = true) {
+    if(has_python)
+      update();
   }
 
   ~SupportedEngines() {