curl_xml plugin: Make absolutely certain “instance_node_obj” is freed.

diff --git a/src/curl_xml.c b/src/curl_xml.c
index 78051667394836ccf141d706f0f544a6763e6076..5fd3f59ae1ec5bfeff38d8b2b30285e1af685f0e 100644 (file)
--- a/src/curl_xml.c
+++ b/src/curl_xml.c
@@ -299,6 +299,7 @@ static int  cx_submit_xpath_values (char *plugin_instance, /* {{{ */
      /* instance has to be an xpath expression */
      if (xpath->instance != NULL)
      {
+        assert (instance_node_obj == NULL);
         instance_node_obj = cx_evaluate_xpath (xpath_ctx, BAD_CAST xpath->instance);
         if (instance_node_obj == NULL)
           continue; /* error is logged already */
@@ -438,8 +439,11 @@ static int  cx_submit_xpath_values (char *plugin_instance, /* {{{ */
 
      sfree(vl.values);
      if (instance_node_obj != NULL)
+     {
        xmlXPathFreeObject (instance_node_obj);
-  }
+       instance_node_obj = NULL;
+     }
+  } /* for (i = 0; i < total_nodes; i++) */
 
   /* free up the allocated memory */
   xmlXPathFreeObject (base_node_obj);