[gedit-plugins/translate] Do not make call if no api key

[Jordi Mas <jmas src gnome org>]

commit 6c3cc15c8f68c0e3ef26b849ac30079a04249269
Author: Jordi Mas <jmas softcatala org>
Date:   Sat Mar 10 06:59:48 2018 +0100

    Do not make call if no api key

 plugins/translate/translate/services/yandex.py |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/plugins/translate/translate/services/yandex.py b/plugins/translate/translate/services/yandex.py
index 9fac9e8..eff0871 100644
--- a/plugins/translate/translate/services/yandex.py
+++ b/plugins/translate/translate/services/yandex.py
@@ -99,6 +99,10 @@ class Yandex(Service):
     def _fetch_remote_language_names(self):
 
         try:
+
+            if len(self._key) == 0:
+                return
+
             url = "{0}/getLangs?ui=en&key={1}".format(self.SERVER, self._key)
             response = urllib.request.urlopen(url)
             payload = json.loads(response.read().decode("utf-8"))