util: Remove NONNULL(2,3) for virHostdevReAttachSCSIVHostDevices

The comparison code used STREQ_NULLABLE anyway for both 'drv_name' and
'dom_name', so no need. Add a NULLSTR on the 'dom_name' too.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/util/virhostdev.c

@@ -1756,7 +1756,7 @@ virHostdevReAttachSCSIVHostDevices(virHostdevManagerPtr mgr,
 
         if (!(host = virSCSIVHostDeviceNew(hostsrc->wwpn))) {
             VIR_WARN("Unable to reattach SCSI_host device %s on domain %s",
-                     hostsrc->wwpn, dom_name);
+                     hostsrc->wwpn, NULLSTR(dom_name));
             virObjectUnlock(mgr->activeSCSIVHostHostdevs);
             return;
         }

src/util/virhostdev.h

@@ -124,7 +124,7 @@ virHostdevReAttachSCSIVHostDevices(virHostdevManagerPtr hostdev_mgr,
                                    const char *dom_name,
                                    virDomainHostdevDefPtr *hostdevs,
                                    int nhostdevs)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
+    ATTRIBUTE_NONNULL(1);
 int
 virHostdevUpdateActivePCIDevices(virHostdevManagerPtr mgr,
                                  virDomainHostdevDefPtr *hostdevs,