Fixed N3DS_TOUCH_ID, 0 is an invalid touch ID

(cherry picked from commit adb51845afa8888c5a5b4beeaa927fdaa2dbed1f)

src/video/n3ds/SDL_n3dstouch.c

@@ -28,7 +28,7 @@
 #include "../../events/SDL_touch_c.h"
 #include "SDL_n3dstouch.h"
 
-#define N3DS_TOUCH_ID 0
+#define N3DS_TOUCH_ID 1
 
 /*
   Factors used to convert touchscreen coordinates to