Set muted channels to empty set if no muted channels

Previously, it was set to the set of an empty string.

1 files changed, 1 insertions, 1 deletions

diff --git a/wee_slack.py b/wee_slack.py
index 757671f..2a0a7b5 100644
--- a/wee_slack.py
+++ b/wee_slack.py
@@ -1099,7 +1099,7 @@ class SlackTeam(object):
                 w.buffer_merge(self.channel_buffer, w.buffer_search_main())
 
     def set_muted_channels(self, muted_str):
-        self.muted_channels = {x for x in muted_str.split(',')}
+        self.muted_channels = {x for x in muted_str.split(',') if x}
 
     def set_highlight_words(self, highlight_str):
         self.highlight_words = {x for x in highlight_str.split(',')}