[libvirt] [PATCH] build: simplify xmlFreeNode usage

[Eric Blake]

Noticed while reviewing the previous patch; thankfully, there
are no violations.

* cfg.mk (useless_free_options): Add xmlFreeNode.
---

> > +    if (def->metadata)
> > +        xmlFreeNode(def->metadata);
> Useless use of if before free, since xmlFreeNode is documented as a
> no-op on NULL.  I'll update our list of function names to include
> xmlFreeNode(), so that 'make syntax-check' will prevent this in the
> future, as a followup patch.

Pushing under the trivial rule.

 cfg.mk |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/cfg.mk b/cfg.mk
index 20a085e..d853caf 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -171,6 +171,7 @@ useless_free_options =				\
   --name=xmlBufferFree				\
   --name=xmlFree				\
   --name=xmlFreeDoc				\
+  --name=xmlFreeNode				\
   --name=xmlXPathFreeContext			\
   --name=xmlXPathFreeObject

-- 
1.7.7.5