Merge remote-tracking branch 'origin/5.4' into dev

Change-Id: I5575a4ba13212c9bfe73a3de3ef17c6528beafc3

src/plugins/windowsaudio/qwindowsaudiodeviceinfo.cpp

@@ -454,7 +454,9 @@ QList<QByteArray> QWindowsAudioDeviceInfo::availableDevices(QAudio::Mode mode)
                 pPropBag->Release();
                 pMoniker->Release();
             }
+            pEnum->Release();
         }
+        pDevEnum->Release();
     }
     CoUninitialize();
 #else // Q_OS_WINCE

src/plugins/windowsaudio/qwindowsaudioinput.cpp

@@ -430,7 +430,7 @@ void QWindowsAudioInput::initMixer()
         return;
     mixerID = (HMIXEROBJ)mixerIntID;
 
-    // Get the Destination (Recording) Line Infomation
+    // Get the Destination (Recording) Line Information
     MIXERLINE mixerLine;
     mixerLine.cbStruct = sizeof(MIXERLINE);
     mixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;