Fix eleven year old typo

No idea if it has actually caused any uninteded behaviour, or if this
fix now then causes something to break.

basic/source/basmgr/basmgr.cxx

@@ -2288,7 +2288,7 @@ Any LibraryContainer_Impl::getByName( const ::rtl::OUString& aName )
     Reference< XNameContainer > xModuleContainer =
         (XNameContainer*)new ModuleContainer_Impl( pLib );
 
-    Reference< XNameContainer > xDialogContainer;
+    Reference< XNameContainer > xDialogContainer =
         (XNameContainer*)new DialogContainer_Impl( pLib );
 
     BasicLibInfo* pLibInfo = mpMgr->FindLibInfo( pLib );