Fix stats updating for FREEMEM module when using kstats

Previously the values were not getting updated on each check, meaning that the
free memory shown would be the free memory as of the last resmon restart. This
only applies to the kstat method. The others are fine.

git-svn-id: https://labs.omniti.com/resmon/trunk@346 8c0face9-b7db-6ec6-c4b3-d5f7145c7d55

lib/Resmon/Module/FREEMEM.pm

@@ -80,6 +80,7 @@ sub handler {
         } else {
             # We have kstat, use that for everything
             my $pagesize = run_cmd("pagesize");
+            $kstat->update();
             my $syspages = $kstat->{unix}->{0}->{system_pages};
             $total_mem = $syspages->{physmem} * $pagesize / 1024 / 1024;
             $free_mem  = $syspages->{freemem} * $pagesize / 1024 / 1024;