Fix a signed/unsigned mismatch

src/irc/irc_client.cpp

@@ -1248,7 +1248,7 @@ void IrcClient::on_channel_mode(const IrcMessage& message)
     }
 }
 
-void IrcClient::set_throttle_limit(std::size_t limit)
+void IrcClient::set_throttle_limit(long int limit)
 {
   this->tokens_bucket.set_limit(limit);
 }

src/irc/irc_client.hpp

@@ -301,7 +301,7 @@ public:
   const std::vector<char>& get_sorted_user_modes() const { return this->sorted_user_modes; }
 
   std::set<char> get_chantypes() const { return this->chantypes; }
-  void set_throttle_limit(std::size_t limit);
+  void set_throttle_limit(long int limit);
   /**
    * Store the history limit that the client asked when joining this room.
    */

src/utils/tokens_bucket.hpp

@@ -19,7 +19,7 @@ class TokensBucket
 public:
   TokensBucket(long int max_size, std::chrono::milliseconds fill_duration, std::function<bool()> callback, std::string name):
       limit(max_size),
-      tokens(limit),
+      tokens(static_cast<std::size_t>(limit)),
       callback(std::move(callback))
   {
     log_debug("creating TokensBucket with max size: ", max_size);