tools: virt-host-validate: fix memory leak

virHostValidateGetCPUFlags returns an allocated virBitmap and
it needs to be freed.

Fixes: a0ec7165e3
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Kristína Hanicová <khanicov@redhat.com>

tools/virt-host-validate-ch.c

@@ -28,7 +28,7 @@
 int virHostValidateCh(void)
 {
     int ret = 0;
-    virBitmap *flags;
+    g_autoptr(virBitmap) flags = NULL;
     bool hasHwVirt = false;
     bool hasVirtFlag = false;
     virArch arch = virArchFromHost();