Added a line of code to remove the first comma at the beginning of Array definition:
var tinyMCEImageList = new Array(,["/public/images/subfolder1/image1.jpg ... 
That situation happens if you have no images in the root directory of images for TinyMCE
Merge pull request #2 from marekmurawski/patch-1

Added a line of code to remove the first comma at the beginning of Array...