Add optional database table prefix (issue #118; see issue comments for details)

templates/themes/rrdtool/theme.php

@@ -61,7 +61,7 @@
 					// debug just the graphing (not updating) with the --debug switch
 					if (!isset($argv[1]) || $argv[1] != '--debug') {
 						// Update graph
-						$query = query(sprintf("SELECT MAX(`id`) FROM `posts_%s`", $board));
+						$query = query(sprintf("SELECT MAX(`id`) FROM ``posts_%s``", $board));
 						$count = $query->fetchColumn();
 					
 						if (!rrd_update($file, Array(