Fixed bug 3191 - haptic system on android?

Patch provided by jintiao and Milan Nikolic, thanks!

src/joystick/android/SDL_sysjoystick_c.h

@@ -22,6 +22,10 @@
 #include "../../SDL_internal.h"
 
 #ifdef SDL_JOYSTICK_ANDROID
+
+#ifndef _SDL_sysjoystick_c_h
+#define _SDL_sysjoystick_c_h
+
 #include "../SDL_sysjoystick.h"
 
 extern int Android_OnPadDown(int device_id, int keycode);
@@ -47,6 +51,8 @@ typedef struct SDL_joylist_item
 
 typedef SDL_joylist_item joystick_hwdata;
 
+#endif /* _SDL_sysjoystick_c_h */
+
 #endif /* SDL_JOYSTICK_ANDROID */
 
 /* vi: set ts=4 sw=4 expandtab: */