Fixed notifications when actions are taken within the same channel..

main.go

@@ -34,7 +34,7 @@ var joinMessages = []string{
 	"<@%s> has joined <#%s>",
 	"<@%s> has joined <#%s>; Join in for some nerd talk",
 	"<#%[2]s> is the place to be! <@%[1]s> just joined",
-	"<#%[2]s> just go a bit cooler, <@%[1]s> is now in",
+	"<#%[2]s> just got a bit cooler, <@%[1]s> is now in",
 	"<@%s> is hanging out in <#%s>",
 }
 
@@ -140,6 +140,10 @@ func (s *Server) voiceStatus(ds *discordgo.Session, m *discordgo.VoiceStateUpdat
 	case len(m.ChannelID) == 0:
 		state = Leaving
 	case m.BeforeUpdate != nil:
+		if m.BeforeUpdate.ChannelID == m.ChannelID {
+			// Action like muting caused new voice state, but in the same channel.
+			return
+		}
 		state = Switching
 	}