Fix remove path crash

src/Reveal.cpp

@@ -629,6 +629,7 @@ void Reveal::testDelete() {
     }
     m_listenersDeleteVec.clear();
 
+
     if(m_modulesDeleteVec.size()>0) {
         MainWindow::getInstance()->refreshModules(true, erasedListeners);
     }

src/modules/RevealedPathModule.cpp

@@ -87,6 +87,12 @@ RevealedPathModule::RevealedPathModule(): RevealedModule() {
 
 RevealedPathModule::~RevealedPathModule() {
     Reveal::getInstance()->unregisterGeom(m_pathGeom);
+    Reveal::getInstance()->removeModuleListObserver(this);
+}
+
+void RevealedPathModule::deleteModule() {
+    RevealedModule::deleteModule();
+    Reveal::getInstance()->removeModuleListObserver(this);
 }
 
 void RevealedPathModule::load(xmlNodePtr node) {

src/modules/RevealedPathModule.hpp

@@ -34,6 +34,8 @@ class RevealedPathModule : public RevealedModule, public ModuleListObserver {
         RevealedPathModule();
         virtual ~RevealedPathModule();
 
+        virtual void deleteModule();
+
         virtual void load(xmlNodePtr node);
         virtual xmlNodePtr save(xmlNodePtr parentNode);