fix int vs. pointer mismatch in return statement.

Add missing include header for compilation on x86 target.

Change-Id: I3651fb3be0178b888c5ada3d3754fb379b55a847

cmds/rawbu/backup.cpp

@@ -14,6 +14,7 @@
 #include <utime.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <stdint.h>
 
 #include <cutils/properties.h>
 

core/jni/android_util_AssetManager.cpp

@@ -1296,7 +1296,7 @@ static jint android_content_AssetManager_getArraySize(JNIEnv* env, jobject clazz
 {
     AssetManager* am = assetManagerForJavaObject(env, clazz);
     if (am == NULL) {
-        return NULL;
+        return 0;
     }
     const ResTable& res(am->getResources());