Merge pull request #1012 from Nanquitas/rosalina-freeze-fix

Rosalina: fix freeze when attempting to open Rosalina before the syst…

sysmodules/rosalina/source/menu.c

@@ -148,15 +148,24 @@ void menuThreadMain(void)
     else
         N3DSMenu_UpdateStatus();
 
+    bool isAcURegistered = false;
+
     while(!terminationRequest)
     {
         if((HID_PAD & menuCombo) == menuCombo)
+        {
+            if (!isAcURegistered)
+                isAcURegistered = R_SUCCEEDED(srvIsServiceRegistered(&isAcURegistered, "ac:u"))
+                    && isAcURegistered;
+
+            if (isAcURegistered)
             {
                 menuEnter();
                 if(isN3DS) N3DSMenu_UpdateStatus();
                 menuShow(&rosalinaMenu);
                 menuLeave();
             }
+        }
         svcSleepThread(50 * 1000 * 1000LL);
     }
 }