don't use iterator for main loop

src/App.cpp

@@ -38,8 +38,8 @@ void App::run() {
     // Main loop
     while (!done && !modules.empty()) {
 
-        for(auto it = modules.begin(); it != modules.end(); it++) {
+        for(auto m : modules) {
-            (*it)->run();
+            m->run();
         }
         
         for(auto it = toClose.begin(); it != modules.end(); it++) {