Vita: Fix off-by-one error for synthetic mouse events

(cherry picked from commit cdc5483cf9683fabf0a897954a510574e61af418)

src/events/SDL_mouse.c

@@ -122,13 +122,13 @@ static void SDLCALL SDL_VitaTouchMouseDeviceChanged(void *userdata, const char *
         switch (*hint) {
         default:
         case '0':
-            mouse->vita_touch_mouse_device = 0;
+            mouse->vita_touch_mouse_device = 1;
             break;
         case '1':
-            mouse->vita_touch_mouse_device = 1;
+            mouse->vita_touch_mouse_device = 2;
             break;
         case '2':
-            mouse->vita_touch_mouse_device = 2;
+            mouse->vita_touch_mouse_device = 3;
             break;
         }
     }

src/events/SDL_touch.c

@@ -252,7 +252,7 @@ int SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid, SDL_Window *window,
     /* SDL_HINT_VITA_TOUCH_MOUSE_DEVICE: controlling which touchpad should generate synthetic mouse events, PSVita-only */
     {
 #if defined(__vita__)
-        if (mouse->touch_mouse_events && ((mouse->vita_touch_mouse_device == id) || (mouse->vita_touch_mouse_device == 2))) {
+        if (mouse->touch_mouse_events && ((mouse->vita_touch_mouse_device == id) || (mouse->vita_touch_mouse_device == 3))) {
 #else
         if (mouse->touch_mouse_events) {
 #endif