Simplify lock detection

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/models/translation.py

@@ -259,21 +259,16 @@ class Translation(models.Model, URLMixin, PercentMixin, LoggerMixin):
             }
         )
 
-    def is_locked(self, request=None, multi=False):
+    def is_locked(self, request=None):
         '''
         Check whether the translation is locked and
         possibly emits messages if request object is
         provided.
         '''
-
-        prj_lock = self.subproject.locked
-        usr_lock = self.is_user_locked(request)
-
-        # Calculate return value
-        if multi:
-            return (prj_lock, usr_lock)
-        else:
-            return prj_lock or usr_lock
+        return (
+            self.is_user_locked(request) or
+            self.subproject.locked
+        )
 
     def is_user_locked(self, request=None):
         '''

weblate/trans/views/edit.py

@@ -464,9 +464,8 @@ def translate(request, project, subproject, lang):
     translation = get_translation(request, project, subproject, lang)
 
     # Check locks
-    project_locked, user_locked = translation.is_locked(
-        request, True
-    )
+    user_locked = translation.is_user_locked(request)
+    project_locked = translation.subproject.locked
     own_lock = self.lock_user == request.user
     locked = project_locked or user_locked