Fix using NULL as an integer

PostTask is passing NULL as a Message, which is being treated as 0
and implicitly constructing a Message.  It is valid to define NULL
as std::nullptr, which cannot be treated as 0 and fails to build.

This doesn't currently happen as this code is only compiled against
bionic, which uses Clang's definition of NULL as 0.  It does happen
in another copy of this code that is compiled for the host, which
when compiling against musl uses std::nullptr for NULL.

Bug: 218888599
Test: m wificond
Change-Id: I1f6e132ee68fa4f7c1480b250c0d6bd8a47e6baf

1 files changed, 2 insertions, 2 deletions

diff --git a/looper_backed_event_loop.cpp b/looper_backed_event_loop.cpp
index b4f5c44..f759948 100644
--- a/looper_backed_event_loop.cpp
+++ b/looper_backed_event_loop.cpp
@@ -79,14 +79,14 @@ LooperBackedEventLoop::~LooperBackedEventLoop() {
 void LooperBackedEventLoop::PostTask(const std::function<void()>& callback) {
   sp<android::MessageHandler> event_loop_callback =
       new EventLoopCallback(callback);
-  looper_->sendMessage(event_loop_callback, NULL);
+  looper_->sendMessage(event_loop_callback, Message());
 }
 
 void LooperBackedEventLoop::PostDelayedTask(
     const std::function<void()>& callback,
     int64_t delay_ms) {
   sp<android::MessageHandler> looper_callback = new EventLoopCallback(callback);
-  looper_->sendMessageDelayed(ms2ns(delay_ms), looper_callback, NULL);
+  looper_->sendMessageDelayed(ms2ns(delay_ms), looper_callback, Message());
 }
 
 bool LooperBackedEventLoop::WatchFileDescriptor(