fixed vita startup crash by guarding commerce calls

Minecraft.Client/Common/UI/UIScene_DLCOffersMenu.cpp

@@ -107,7 +107,7 @@ int UIScene_DLCOffersMenu::ExitDLCOffersMenu(void *pParam,int iPad,C4JStorage::E
 
 #ifdef __ORBIS__
 	sceNpCommerceHidePsStoreIcon();
-#elif defined __PSVITA__
+#elif defined(__PSVITA__) && !defined(DISABLE_PSN)
 	app.GetCommerce()->HidePsStoreIcon();
 #endif
 	ui.NavigateToHomeMenu();//iPad,eUIScene_MainMenu);