Don't set the intent to null, only set the intent data to null.

Cherry-picked from d1f74df6866a3697146fec401683e880b6d9ce46. Closes #268.

app/src/main/java/org/love2d/android/GameActivity.java

@@ -101,9 +101,9 @@ public class GameActivity extends SDLActivity {
         }
 
         Intent intent = getIntent();
-        // Prevent SDL sending filedropped event. Let us do that instead.
-        setIntent(null);
         handleIntent(intent, true);
+        // Prevent SDL sending filedropped event. Let us do that instead.
+        intent.setData(null);
 
         super.onCreate(savedInstanceState);