Converted existing vulkan program without vkbootstrap to use SDL callbacks

include/vulkanapp.hh

@@ -53,6 +53,9 @@ public:
     void init();
     void loop();
     void cleanup();
+    inline bool minimized() { return mMinimized; }
+    inline void minimized(bool v) { mMinimized = v; }
+    inline void resized(bool v) { mResized = v; }
 private:
     // SDL2
     SDL_Window *mWin;
@@ -61,7 +64,7 @@ private:
     // Not tied to library
     uint32_t mWidth;
     uint32_t mHeight;
-    bool mActive = false;
+    // bool mActive = false;
     bool mResized = false;
     bool mMinimized = false;