mangoapp: don't use fsr if msg doesn't contain fsr

src/app/main.cpp

@@ -33,8 +33,8 @@ bool mangoapp_paused = false;
 std::mutex mangoapp_m;
 std::condition_variable mangoapp_cv;
 static uint8_t raw_msg[1024] = {0};
-uint8_t g_fsrUpscale;
-uint8_t g_fsrSharpness;
+uint8_t g_fsrUpscale = 0;
+uint8_t g_fsrSharpness = 0;
 
 void ctrl_thread(){
     while (1){
@@ -89,8 +89,10 @@ void msg_read_thread(){
         if (hdr->version == 1){
             if (msg_size > offsetof(struct mangoapp_msg_v1, frametime_ns)){
                 update_hud_info_with_frametime(sw_stats, *params, vendorID, mangoapp_v1->frametime_ns);
-                g_fsrUpscale = mangoapp_v1->fsrUpscale;
-                g_fsrSharpness = mangoapp_v1->fsrSharpness;
+                if (msg_size > offsetof(mangoapp_msg_v1, fsrUpscale)){
+                    g_fsrUpscale = mangoapp_v1->fsrUpscale;
+                    g_fsrSharpness = mangoapp_v1->fsrSharpness;
+                }
                 {
                     std::unique_lock<std::mutex> lk(mangoapp_m);
                     new_frame = true;