Debugger: Add more helpers to Team.

ClearImages():
- Removes all existing images from the team's image list and notifies callers.
  To be used in case of an exec().

ClearSignalDispositionMappings():
- Remove any existing custom signal disposition mappings. This is intended to
  be used in preparation for loading new ones from a team after exec() is
  called.

src/apps/debugger/model/Team.cpp

@@ -277,6 +277,14 @@ Team::Images() const
 }
 
 
+void
+Team::ClearImages()
+{
+	while (!fImages.IsEmpty())
+		RemoveImage(fImages.First());
+}
+
+
 bool
 Team::AddStopImageName(const BString& name)
 {
@@ -377,6 +385,13 @@ Team::GetSignalDispositionMappings() const
 }
 
 
+void
+Team::ClearSignalDispositionMappings()
+{
+	fCustomSignalDispositions.clear();
+}
+
+
 bool
 Team::AddBreakpoint(Breakpoint* breakpoint)
 {

src/apps/debugger/model/Team.h

@@ -137,6 +137,7 @@ class Team {
 			Image*				ImageByID(image_id imageID) const;
 			Image*				ImageByAddress(target_addr_t address) const;
 			const ImageList&	Images() const;
+			void				ClearImages();
 
 			bool				AddStopImageName(const BString& name);
 			void				RemoveStopImageName(const BString& name);
@@ -161,6 +162,8 @@ class Team {
 			const SignalDispositionMappings&
 								GetSignalDispositionMappings() const;
 
+			void				ClearSignalDispositionMappings();
+
 			bool				AddBreakpoint(Breakpoint* breakpoint);
 									// takes over reference (also on error)
 			void				RemoveBreakpoint(Breakpoint* breakpoint);