Make BObjectList<> publically available:

* cleaned up ObjectList.h
* switched several uses of new() to new(std::nothrow)
* moved ugly AsBList() hack into BObjectList<>::Private class and
  adjusted all callers accordingly


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40252 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/support/ObjectListPrivate.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2011, Oliver Tappe <[email protected]>
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _OBJECT_LIST_PRIVATE_H
+#define _OBJECT_LIST_PRIVATE_H
+
+
+#include <ObjectList.h>
+
+
+template<class T>
+class BObjectList<T>::Private {
+public:
+	Private(BObjectList<T>* objectList)
+		:
+		fObjectList(objectList)
+	{
+	}
+
+	BList*
+	AsBList()
+	{
+		return fObjectList;
+	}
+
+	const BList*
+	AsBList() const
+	{
+		return fObjectList;
+	}
+
+private:
+	BObjectList<T>* fObjectList;
+};
+
+
+#endif	// _OBJECT_LIST_PRIVATE_H