fixed a bug in xml::ElementParseCreater::Start/End

src/xml/ElementParseCreater.cpp

@@ -14,7 +14,17 @@ namespace hgl
             ElementCreater *ec=cur_ec->GetSubElementCreater(element_name);
 
             ecs_stack.Push(cur_ec);
+            
+            cur_ec=nullptr;
+
+            if(ec)
+            {
+                if(ec->Start())
                     cur_ec=ec;
+                else
+                    delete ec;
+            }
+
             return(cur_ec);
         }
 
@@ -33,9 +43,13 @@ namespace hgl
         }
 
         void ElementParseCreater::End(const char *element_name)
+        {
+            if(cur_ec)
             {
                 cur_ec->End();
                 cur_ec=nullptr;
+            }
+
             ecs_stack.Pop(cur_ec);
         }
     }//namespace xml