Loader was too specific about === "", some cases were NULL.

Signed-off-by: Phil Sturgeon <email@philsturgeon.co.uk>
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 66a9e7f..09e9487 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -261,7 +261,7 @@
 			$model = substr($model, $last_slash);
 		}
 
-		if ($name === '')
+		if (empty($name))
 		{
 			$name = $model;
 		}