malloc.h ain't no standard header. Small style change.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27610 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/deskbar/BarApp.cpp

@@ -33,7 +33,7 @@ All rights reserved.
 */
 
 #include <Debug.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include <AppFileInfo.h>
@@ -576,7 +576,7 @@ TBarApp::Unsubscribe(const BMessenger &subscriber)
 		BMessenger *messenger = (BMessenger *)sSubscribers.ItemAt(i);
 		if (*messenger == subscriber) {
 			sSubscribers.RemoveItem(i);
-			delete (messenger);
+			delete messenger;
 			break;
 		}
 	}