Fixed Chatterino attempting to send empty messages in IRC (#3355)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

CHANGELOG.md

@@ -56,6 +56,7 @@
 - Bugfix: Fixed IRC ACTION messages (/me) not being colorized properly. (#3341)
 - Bugfix: Fixed splits losing filters when closing and reopening them (#3351)
 - Bugfix: Fixed the first usercard being broken in `/mods` and `/vips` (#3349)
+- Bugfix: Fixed Chatterino attempting to send empty messages (#3355)
 - Dev: Add GitHub action to test builds without precompiled headers enabled. (#3327)
 - Dev: Renamed CMake's build option `USE_SYSTEM_QT5KEYCHAIN` to `USE_SYSTEM_QTKEYCHAIN`. (#3103)
 - Dev: Add benchmarks that can be compiled with the `BUILD_BENCHMARKS` CMake flag. Off by default. (#3038)

src/providers/irc/IrcChannel2.cpp

@@ -18,6 +18,10 @@ IrcChannel::IrcChannel(const QString &name, IrcServer *server)
 void IrcChannel::sendMessage(const QString &message)
 {
     assertInGuiThread();
+    if (message.isEmpty())
+    {
+        return;
+    }
 
     if (message.startsWith("/"))
     {