DJ-Webp 1.1 Interlace handling should be turned on when using png_read_image

DJ-Webp 1.1 Interlace handling should be turned on when using png_read_image

Hi,
DJ-Webp 1.1 is working ok, but as I told it in another topic, for some png it does not do the conversion.

And in my error log there's :
  1. PHP Warning:  imagecreatefrompng(): gd-png: libpng warning: Interlace handling should be turned on when using png_read_image in /plugins/system/djimgtowebp/djimgtowebp.php on line 188

Line 188 is :
  1.                                     $img = imagecreatefrompng($imgPath);
So I believe that it could be change with the add of this at line 202
Just after :
                            imagesavealpha($img, true);
Add:
                            imageinterlace($imgtrue);

Thanks to consider
Regards