default config handling wasn't working with latest version of ssp-base.

Billy Clark · Billy Clark · commit bbde1ceb10ba · 2017-11-17T11:04:28.000-05:00
diff --git a/themes/material/common-head-elements.php b/themes/material/common-head-elements.php
@@ -29,7 +29,7 @@
 
 
 <?php
-$colors = htmlentities($this->configuration->getValue('theme.color-scheme', 'indigo-purple'));
+$colors = htmlentities($this->configuration->getValue('theme.color-scheme') ?: 'indigo-purple');
 ?>
 <link rel="stylesheet" href="material.<?= $colors ?>.1.2.1.min.css">
 <link rel="stylesheet" href="styles.2.2.1.css">
