feature #1556: Add a new user template to the VM to store user defined variables. Add OCA Ruby & JAVA bindings for the new update method. Add command option for onevm tool.

src/pool/PoolObjectSQL.cc

@@ -182,7 +182,10 @@ int PoolObjectSQL::replace_template(const string& tmpl_str, string& error)
         return -1;
     }
 
-    delete obj_template;
+    if ( obj_template != 0 )
+    {
+        delete obj_template;
+    }
 
     obj_template = new_tmpl;