Fix occurrences of const typed declaration without initialization

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 37699b72562dfce5281329ed887f53f6e383411d..9affbdd107c784dc38278222ee9540770e967e74 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -103,7 +103,9 @@ struct ExperimentalNs {
 // Use to enable beamforming. Must be provided through the constructor. It will
 // have no impact if used with AudioProcessing::SetExtraOptions().
 struct Beamforming {
-  Beamforming() : enabled(false) {}
+  Beamforming()
+      : enabled(false),
+        array_geometry() {}
   Beamforming(bool enabled, const std::vector<Point>& array_geometry)
       : enabled(enabled),
         array_geometry(array_geometry) {}