selinux: Avoid label reservations for type = none

For security type='none' libvirt according to the docs should not
generate seclabel be it for selinux or any model. So, skip the
reservation of labels when type is none.
Signed-off-by: NShivaprasad G Bhat <sbhat@linux.vnet.ibm.com>

src/security/security_selinux.c

@@ -731,7 +731,9 @@ virSecuritySELinuxReserveSecurityLabel(virSecurityManagerPtr mgr,
     virSecurityLabelDefPtr seclabel;
 
     seclabel = virDomainDefGetSecurityLabelDef(def, SECURITY_SELINUX_NAME);
-    if (!seclabel || seclabel->type == VIR_DOMAIN_SECLABEL_STATIC)
+    if (!seclabel ||
+        seclabel->type == VIR_DOMAIN_SECLABEL_NONE ||
+        seclabel->type == VIR_DOMAIN_SECLABEL_STATIC)
         return 0;
 
     if (getpidcon_raw(pid, &pctx) == -1) {