Debugger: Add VariablesView listener hook.

VariablesView::Listener:
- Add hook for requesting value node value updates.

TeamWindow:
- Implement VariablesView listener hook and forward accordingly to
  TeamDebugger.

src/apps/debugger/user_interface/gui/team_window/TeamWindow.cpp

@@ -897,6 +897,14 @@ TeamWindow::ExpressionEvaluationRequested(ExpressionInfo* info,
 }
 
 
+void
+TeamWindow::ValueNodeWriteRequested(ValueNode* node, CpuState* state,
+	Value* newValue)
+{
+	fListener->ValueNodeWriteRequested(node, state, newValue);
+}
+
+
 void
 TeamWindow::ThreadStateChanged(const Team::ThreadEvent& event)
 {

src/apps/debugger/user_interface/gui/team_window/TeamWindow.h

@@ -130,6 +130,8 @@ class TeamWindow : public BWindow, ThreadListView::Listener,
 									ExpressionInfo* info,
 									StackFrame* frame,
 									::Thread* thread);
+	virtual	void				ValueNodeWriteRequested(ValueNode* node,
+									CpuState* state, Value* value);
 
 	// Team::Listener
 	virtual	void				ThreadStateChanged(

src/apps/debugger/user_interface/gui/team_window/VariablesView.h

@@ -159,6 +159,12 @@ class VariablesView::Listener {
 									ExpressionInfo* info,
 									StackFrame* frame,
 									Thread* thread) = 0;
+
+	virtual	void				ValueNodeWriteRequested(
+									ValueNode* node,
+									CpuState* state,
+									Value* newValue) = 0;
+
 };