Simply copy the sticker to the cache when sending it

Prevent infinite loop when missing local cache

app/widgets/Chat/Chat.php

@@ -686,7 +686,8 @@ class Chat extends \Movim\Widget\Base
             $sticker = $p->get($message->sticker, false, false, 'png');
             $stickerSize = $p->getSize();
 
-            if ($sticker == false) {
+            if ($sticker == false
+            && $message->jidfrom != $message->session) {
                 $r = new Request;
                 $r->setTo($message->jidfrom)
                     ->setResource($message->resource)

app/widgets/Stickers/Stickers.php

@@ -51,14 +51,9 @@ class Stickers extends \Movim\Widget\Base
 
         if(!file_exists($filepath)) return;
 
-        // We get the base64
-        $base64 = base64_encode(file_get_contents($filepath));
-
         // Caching the picture
         if(!file_exists(CACHE_PATH.md5($key).'.png')) {
-            $p = new Picture;
-            $p->fromBase($base64);
-            $p->set($key, 'png');
+            copy($filepath, CACHE_PATH.md5($key).'.png');
         }
 
         // Creating a message