AudioApplet: Round the volume to the nearest integer

Author: https://github.com/Granddave
Commit: 3f6ccf63fe
Pull-request: https://github.com/SerenityOS/serenity/pull/10119
Reviewed-by: https://github.com/kleinesfilmroellchen ✅

Userland/Applets/Audio/main.cpp

@@ -40,7 +40,7 @@ public:
         };
 
         m_audio_client->on_main_mix_volume_change = [this](double volume) {
-            m_audio_volume = static_cast<int>(volume * 100);
+            m_audio_volume = static_cast<int>(round(volume * 100));
             m_slider->set_value(m_slider->max() - m_audio_volume, GUI::CallOnChange::No);
             if (!m_audio_muted)
                 update();