Ensure audio recording works by default.

Index: src/control/settings/Settings.cpp
--- src/control/settings/Settings.cpp.orig
+++ src/control/settings/Settings.cpp
@@ -161,8 +161,8 @@ void Settings::loadDefault() {
     // clang-format on
 
     this->audioSampleRate = 44100.0;
-    this->audioInputDevice = -1;
-    this->audioOutputDevice = -1;
+    this->audioInputDevice = 0;
+    this->audioOutputDevice = 0;
     this->audioGain = 1.0;
     this->defaultSeekTime = 5;
 
