Fix weak vtables

src/blackmisc/network/ecosystemprovider.h

@@ -63,6 +63,8 @@ namespace BlackMisc
         //! Delegating class which can be directly used to access an \sa IEcosystemProvider instance
         class BLACKMISC_EXPORT CEcosystemAware : public IProviderAware<IEcosystemProvider>
         {
+            virtual void anchor();
+
         public:
             //! Set the provider
             void setEcosystemProvider(IEcosystemProvider *provider) { this->setProvider(provider); }