Use lambda for sort comparer

Author: remutro

desktop-ui/emulator/emulator.hpp

@@ -34,7 +34,6 @@ struct Emulator {
   virtual auto arcade() -> bool { return false; }
   virtual auto group() -> string { return manufacturer; }
   virtual auto portMenu(Menu& portMenu, ares::Node::Port port) -> void {}
-  static auto emuComparer(std::shared_ptr<Emulator> a, std::shared_ptr<Emulator> b) -> bool { return (a->name < b->name); }
 
   struct Firmware {
     string type;

desktop-ui/emulator/emulators.cpp

@@ -259,5 +259,7 @@ auto Emulator::construct() -> void {
   emulators.push_back(std::make_shared<ZXSpectrum128>());
   #endif
 
-  std::sort(emulators.begin(), emulators.end(), emuComparer);
+  std::sort(emulators.begin(), emulators.end(), [](std::shared_ptr<Emulator> a, std::shared_ptr<Emulator> b) { 
+    return (a->name < b->name); 
+  });
 }