PropertyStoragePtr: fix operator bool()

src/OpenVolumeMesh/Core/PropertyStorageT.hh

@@ -76,7 +76,10 @@ public:
     iterator begin() { return storage()->begin(); }
     iterator end()   { return storage()->end(); }
     size_t size() const { return storage()->size(); }
-    operator bool() const {return storage()->resMan() != nullptr;}
+
+    [[deprecated]]
+        // TODO: check if we have a  tracker
+    operator bool() const {return true;}
 
 
     /// No range check performed!