util: cgroup: Add missing parameter maxthreads to virCgroupNewMachine

Commit d5572f62 forgot to add maxthreads to the non-Linux definition
of the function, thus breaking the MinGW build.
Signed-off-by: NErik Skultety <eskultet@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Acked-by: NPeter Krempa <pkrempa@redhat.com>

src/util/vircgroup.c

@@ -2891,6 +2891,7 @@ virCgroupNewMachine(const char *name ATTRIBUTE_UNUSED,
                     int *nicindexes ATTRIBUTE_UNUSED,
                     const char *partition ATTRIBUTE_UNUSED,
                     int controllers ATTRIBUTE_UNUSED,
+                    unsigned int maxthreads ATTRIBUTE_UNUSED,
                     virCgroupPtr *group ATTRIBUTE_UNUSED)
 {
     virReportSystemError(ENXIO, "%s",