Use NULL instead of 0 for pointer arguments of CallStaticVoidMethod.

CallStaticVoidMethod is varargs function, and calling it with
a literal 0 like CallStaticVoidMethod(..., 0) will treat the
argument as a 4 byte int in both 32 and 64 bit processes.

This is incorrect for pointer arguments where NULL should be
used instead.

Reviewed-by: Liao, Bruce <bruce.liao@intel.com>
Signed-off-by: Yong Yao <yong.yao@intel.com>

Change-Id: I9d700d3790a80dbee6826f64baf9ef5d81ca390f

media/jni/android_media_MediaRecorder.cpp

@@ -102,7 +102,7 @@ void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2)
     ALOGV("JNIMediaRecorderListener::notify");
 
     JNIEnv *env = AndroidRuntime::getJNIEnv();
-    env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, 0);
+    env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, NULL);
 }
 
 // ----------------------------------------------------------------------------

media/jni/audioeffect/android_media_Visualizer.cpp

@@ -325,7 +325,7 @@ static void android_media_visualizer_effect_callback(int32_t event,
             fields.midPostNativeEvent,
             callbackInfo->visualizer_ref,
             NATIVE_EVENT_SERVER_DIED,
-            0, 0, 0);
+            0, 0, NULL);
     }
 }