Add allowfullscreen param to web arte.tv service. Default value is allowed.

tarteaucitron.services.js

@@ -939,13 +939,14 @@ tarteaucitron.services.artetv = {
                 video_json = x.getAttribute("json"),
                 video_width = x.getAttribute("width"),
                 video_height = x.getAttribute("height"),
-                video_frame;
+                video_frame,
+                video_allowfullscreen = x.getAttribute("allowfullscreen");
 
             if (video_json === undefined) {
                 return "";
             }
 
-            video_frame = '<iframe title="' + frame_title + '" style="transition-duration: 0; transition-property: no; margin: 0 auto; position: relative; display: block; background-color: #000000;" src="https://www.arte.tv/player/v5/index.php?json_url=' + video_json + '" width="' + video_width + '" height="' + video_height + '" scrolling="no" allowfullscreen="allowfullscreen"></iframe>';
+            video_frame = '<iframe title="' + frame_title + '" style="transition-duration: 0; transition-property: no; margin: 0 auto; position: relative; display: block; background-color: #000000;" src="https://www.arte.tv/player/v5/index.php?json_url=' + video_json + '" width="' + video_width + '" height="' + video_height + '" scrolling="no" ' + (video_allowfullscreen == '0' ? '' : ' webkitallowfullscreen mozallowfullscreen allowfullscreen') + '></iframe>';
             return video_frame;
         });
     },