Throw an exception when attempting to register an extension with a name that already exists

Previously this silently failed

1 files changed, 1 insertions, 1 deletions

diff --git a/include/extensible.h b/include/extensible.h
index f327cf75c..bcc4992bb 100644
--- a/include/extensible.h
+++ b/include/extensible.h
@@ -101,7 +101,7 @@ class CoreExport ExtensionManager
 {
 	std::map<std::string, reference<ExtensionItem> > types;
  public:
-	void Register(ExtensionItem* item);
+	bool Register(ExtensionItem* item);
 	void BeginUnregister(Module* module, std::vector<reference<ExtensionItem> >& list);
 	ExtensionItem* GetItem(const std::string& name);
 };