Merge "Fix an instance of -Wunused-but-set-variable." am: c10adebed6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1829955

Change-Id: I7095f3e7ce171f0be9402d91475b74e623316545

libs/hwui/jni/PaintFilter.cpp

@@ -74,7 +74,7 @@ int register_android_graphics_DrawFilter(JNIEnv* env) {
     result |= RegisterMethodsOrDie(env, "android/graphics/PaintFlagsDrawFilter", paintflags_methods,
                                    NELEM(paintflags_methods));
 
-    return 0;
+    return result;
 }
 
 }