Avoid uninitialized data in qemuMonitorTestNew

The virDomainChrSourceDef variable should be memset to
0, so that the cleanup block does not free uninitialized
data on OOM.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

tests/qemumonitortestutils.c

@@ -878,6 +878,8 @@ qemuMonitorTestNew(bool json,
     qemuMonitorTestPtr test = NULL;
     virDomainChrSourceDef src;
 
+    memset(&src, 0, sizeof(src));
+
     if (!(test = qemuMonitorCommonTestNew(xmlopt, vm, &src)))
         goto error;
 
@@ -915,6 +917,8 @@ qemuMonitorTestNewAgent(virDomainXMLOptionPtr xmlopt)
     qemuMonitorTestPtr test = NULL;
     virDomainChrSourceDef src;
 
+    memset(&src, 0, sizeof(src));
+
     if (!(test = qemuMonitorCommonTestNew(xmlopt, NULL, &src)))
         goto error;