move titleRefreshPeriod out of the TwitchChannel class

this fixes a "use of uninitialized variable" error

src/providers/twitch/TwitchChannel.cpp

@@ -31,6 +31,7 @@
 
 namespace chatterino {
 namespace {
+    constexpr int TITLE_REFRESH_PERIOD = 10;
     constexpr char MAGIC_MESSAGE_SUFFIX[] = u8" \U000E0000";
 
     // parseRecentMessages takes a json object and returns a vector of
@@ -89,7 +90,7 @@ TwitchChannel::TwitchChannel(const QString &name,
     , bttvEmotes_(std::make_shared<EmoteMap>())
     , ffzEmotes_(std::make_shared<EmoteMap>())
     , mod_(false)
-    , titleRefreshedTime_(QTime::currentTime().addSecs(-titleRefreshPeriod_))
+    , titleRefreshedTime_(QTime::currentTime().addSecs(-TITLE_REFRESH_PERIOD))
 {
     log("[TwitchChannel:{}] Opened", name);
 
@@ -447,7 +448,7 @@ void TwitchChannel::refreshTitle()
         return;
     }
 
-    if (this->titleRefreshedTime_.elapsed() < this->titleRefreshPeriod_ * 1000)
+    if (this->titleRefreshedTime_.elapsed() < TITLE_REFRESH_PERIOD * 1000)
     {
         return;
     }

src/providers/twitch/TwitchChannel.hpp

@@ -169,8 +169,6 @@ private:
     QTimer chattersListTimer_;
     QTime titleRefreshedTime_;
 
-    const int titleRefreshPeriod_ = 10;
-
     friend class TwitchIrcServer;
     friend class TwitchMessageBuilder;
     friend class IrcMessageHandler;