CSS merge logs exception if file is missing, but doesn't break (#2754)

Author: sreichel

app/code/core/Mage/Core/Helper/Data.php

@@ -780,7 +780,7 @@ public function mergeFiles(
                     foreach ($srcFiles as $file) {
                         if (!file_exists($file)) {
                             // no translation intentionally
-                            throw new Exception(sprintf('File %s not found.', $file));
+                            Mage::logException(new Exception(sprintf('File %s not found.', $file)));
                         } elseif (@filemtime($file) > $targetMtime) {
                             $shouldMerge = true;
                             break;