Fix some compiler warnings.

As it turns out, we had an overloaded virtual from an earlier era,
with the extra parameter never used.  So cleaning that up was a
bonus to remove the compiler warning.

Change-Id: I780287f8a5d2b0a1ec84ec62c88ba50e051f372b
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/plugins/pulseaudio/qaudioinput_pulse.cpp

@@ -471,7 +471,7 @@ qint64 QPulseAudioInput::read(char *data, qint64 len)
         if (m_pullMode) {
             actualLength = m_audioSource->write(static_cast<const char *>(audioBuffer), readLength);
 
-            if (actualLength < readLength) {
+            if (actualLength < qint64(readLength)) {
                 pa_threaded_mainloop_unlock(pulseEngine->mainloop());
 
                 m_errorState = QAudio::UnderrunError;
@@ -489,7 +489,7 @@ qint64 QPulseAudioInput::read(char *data, qint64 len)
         qDebug() << "QPulseAudioInput::read -- wrote " << actualLength << " to client";
 #endif
 
-        if (actualLength < readLength) {
+        if (actualLength < qint64(readLength)) {
 #ifdef DEBUG_PULSE
             qDebug() << "QPulseAudioInput::read -- appending " << readLength - actualLength << " bytes of data to temp buffer";
 #endif

src/plugins/qt7/qt7movierenderer.mm

@@ -401,6 +401,8 @@ void QT7MovieRenderer::setMovie(void *movie)
 
         setupVideoOutput();
     }
+#else
+    Q_UNUSED(movie);
 #endif
 }