Fix issue when calling getLocalizedURL() on L5.5 (credits to leMaur)

Author: Marc Cámara

composer.json

@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": ">=7.0.0",
-        "laravel/framework": "~5.2, ~5.3, ~5.4, ~5.5"
+        "laravel/framework": "~5.2||~5.3||~5.4||~5.5"
     },
     "require-dev": {
         "orchestra/testbench-browser-kit": "~3.4",

src/Mcamara/LaravelLocalization/LaravelLocalization.php

@@ -211,7 +211,7 @@ public function localizeURL($url = null, $locale = null)
      * @param string|bool  $locale     Locale to adapt, false to remove locale
      * @param string|false $url        URL to adapt in the current language. If not passed, the current url would be taken.
      * @param array        $attributes Attributes to add to the route, if empty, the system would try to extract them from the url.
-     * @param bool         $forceDefaultLocation Force to show default location even hideDefaultLocaleInURL set as TRUE	
+     * @param bool         $forceDefaultLocation Force to show default location even hideDefaultLocaleInURL set as TRUE
      *
      * @throws SupportedLocalesNotDefined
      * @throws UnsupportedLocaleException
@@ -829,7 +829,7 @@ protected function extractAttributes($url = false, $locale = '')
                 return [];
             }
 
-            $attributes = $this->router->current()->parameters();
+            $attributes = $this->normalizeAttributes($this->router->current()->parameters());
             $response = event('routes.translation', [$locale, $attributes]);
 
             if (!empty($response)) {
@@ -876,4 +876,19 @@ protected function unparseUrl($parsed_url)
 
         return $url;
     }
+
+    /**
+    * Normalize attributes gotten from request parameters.
+    *
+    * @param      array  $attributes  The attributes
+    * @return     array  The normalized attributes
+    */
+     protected function normalizeAttributes($attributes)
+     {
+         if (array_key_exists('data', $attributes) && is_array($attributes['data']) && ! count($attributes['data'])) {
+             $attributes['data'] = null;
+             return $attributes;
+         }
+         return $attributes;
+     }
 }