Fix warnings in qtmultimedia

/camerabinresourcepolicy.cpp💯42: error: unused variable 'oldSet' [-Werror=unused-variable]
camerabincontrol.cpp:167:54: error: 'resourceSet' may be used uninitialized in this function [-Werror=maybe-uninitialized]
qaudiooutput_pulse.cpp:416:20: error: unused variable 'bytesWritten' [-Werror=unused-variable]

Change-Id: Idafd85b7985673f1f22d868b5f1b1e46a60ada4a
Reviewed-by: Christian Stromme <christian.stromme@digia.com>

src/plugins/gstreamer/camerabin/camerabincontrol.cpp

@@ -149,7 +149,7 @@ void CameraBinControl::setState(QCamera::State state)
             return;
         }
 
-        CamerabinResourcePolicy::ResourceSet resourceSet;
+        CamerabinResourcePolicy::ResourceSet resourceSet = CamerabinResourcePolicy::NoResources;
         switch (state) {
         case QCamera::UnloadedState:
             resourceSet = CamerabinResourcePolicy::NoResources;

src/plugins/gstreamer/camerabin/camerabinresourcepolicy.cpp

@@ -162,6 +162,8 @@ void CamerabinResourcePolicy::setResourceSet(CamerabinResourcePolicy::ResourceSe
             m_resource->release();
         }
     }
+#else
+    Q_UNUSED(oldSet);
 #endif
 }
 

src/plugins/pulseaudio/qaudiooutput_pulse.cpp

@@ -415,6 +415,7 @@ void QPulseAudioOutput::userFeed()
             }
             qint64 bytesWritten = write(m_audioBuffer, audioBytesPulled);
             Q_ASSERT(bytesWritten == audioBytesPulled); //unfinished write should not happen since the data provided is less than writableSize
+            Q_UNUSED(bytesWritten);
 
             if (chunks > 1) {
                 // PulseAudio needs more data. Ask for it immediately.