util: fix virNetDevSetCoalesce fallback on Win32/FreeBSD

The current fallback stub for virNetDevSetCoalesce is inside an
earlier conditional block. This deals with the feature being
missing on older Linux platforms. We need a second fallback stub
though, outside the top level conditional, to ensure builds work
on Win32/FreeBSD platforms too.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

src/util/virnetdev.c

@@ -3207,6 +3207,15 @@ virNetDevGetFeatures(const char *ifname ATTRIBUTE_UNUSED,
               ifname);
     return 0;
 }
+
+int virNetDevSetCoalesce(const char *ifname,
+                         virNetDevCoalescePtr coalesce ATTRIBUTE_UNUSED)
+{
+    virReportSystemError(ENOSYS,
+                         _("Cannot set coalesce info on interface '%s'"),
+                         ifname);
+    return -1;
+}
 #endif