Fix some easy leaks reported by asan.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3411 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/Task.cpp

@@ -98,6 +98,7 @@ Task::Task() {
 	++_count;
 	v8::Isolate::CreateParams options;
 	options.array_buffer_allocator = v8::ArrayBuffer::Allocator::NewDefaultAllocator();
+	_allocator = options.array_buffer_allocator;
 	_isolate = v8::Isolate::New(options);
 	_isolate->SetData(0, this);
 	_isolate->SetCaptureStackTraceForUncaughtExceptions(true, 16);
@@ -117,6 +118,9 @@ Task::~Task() {
 	_isolate->Dispose();
 	_isolate = 0;
 
+	delete _allocator;
+	_allocator = nullptr;
+
 	uv_loop_delete(_loop);
 	--_count;
 }