Don't always show the core upgrade message on the admin screen.

I errorneously added this when committing evonne's theme stuff.
Signed-off-by: Nigel McNie <nigel@catalyst.net.nz>

htdocs/lib/upgrade.php

@@ -76,7 +76,7 @@ function check_upgrades($name=null) {
             $toupgrade['core'] = $core;
             $installing = true;
         }
-        else if (true || $config->version > $coreversion) {
+        else if ($config->version > $coreversion) {
             $corerelease = get_config('release');
             if (isset($config->minupgradefrom) && isset($config->minupgraderelease)
                 && $coreversion < $config->minupgradefrom) {