[libvirt] [PATCH v2 8/8] util: Add object checking for virObject{Ref|Unref}

[John Ferlan]

Rather than assuming that what's passed to virObject{Ref|Unref}
would be a virObjectPtr as long as it's not NULL, let's do the
similar checks virObjectIsClass in order to prevent a possible
increment or decrement to some field at the obj->u.s.refs offset.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/util/virobject.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/util/virobject.c b/src/util/virobject.c
index 54d78b0..cfa821c 100644
--- a/src/util/virobject.c
+++ b/src/util/virobject.c
@@ -343,7 +343,7 @@ virObjectUnref(void *anyobj)
 {
     virObjectPtr obj = anyobj;
 
-    if (!obj)
+    if (VIR_OBJECT_NOTVALID(obj))
         return false;
 
     bool lastRef = virAtomicIntDecAndTest(&obj->u.s.refs);
@@ -382,7 +382,7 @@ virObjectRef(void *anyobj)
 {
     virObjectPtr obj = anyobj;
 
-    if (!obj)
+    if (VIR_OBJECT_NOTVALID(obj))
         return NULL;
     virAtomicIntInc(&obj->u.s.refs);
     PROBE(OBJECT_REF, "obj=%p", obj);
-- 
2.9.4