Make getAdminGroupIDs static

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diff --git a/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionPackageInstallationPlugin.class.php b/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionPackageInstallationPlugin.class.php
index 3ffd8daba449c5e2e79dd3a478899a0ea4c1b580..bc0807e45d3d1adcb238338be986c76089ead322 100644 (file)
--- a/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionPackageInstallationPlugin.class.php
+++ b/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionPackageInstallationPlugin.class.php
@@ -142,7 +142,7 @@ class UserGroupOptionPackageInstallationPlugin extends AbstractOptionPackageInst
         * 
         * @return      array<integer>
         */
-       protected function getAdminGroupIDs() {
+       protected static function getAdminGroupIDs() {
                if (empty(self::$adminGroupIDs)) {
                        $userGroupList = new UserGroupList();
                        $userGroupList->sqlLimit = 0;