Added try catch handler to fetch exceptions when requesting getimages… (

#13)

* Added try catch handler to fetch exceptions when requesting getimagesize.

* Logging error (if logger exists) if getimagesize is empty.

code/ImageOptimiserService.php

@@ -40,7 +40,14 @@ public function setLogger($logger)
     public function optimiseImage($filename)
     {
         if (file_exists($filename)) {
-            list($width, $height, $type, $attr) = getimagesize($filename);
+            $size = @getimagesize($filename);
+            if (!is_array($size)) {
+                if (null !== $this->logger) {
+                    $this->logger->error("Error reading file when attempting to optimize");
+                }
+                return;
+            }
+            list($width, $height, $type, $attr) = $size;
 
             $commands = $this->getCommands($filename, $type = $this->getImageType($type));
 
@@ -139,4 +146,4 @@ private function execCommand($command)
 
         return $process;
     }
-}
+}