Fix T50843: Pitched Audio renders incorrectly in VSE

There was a bug in the intended code behaviour to always seek with a
pitch of 1.0 regardless of pitch/pitch animation/doppler effects.

Check the bug report for a more detailed explanation of problems
concerning pitch and seeking.

intern/audaspace/intern/AUD_SoftwareDevice.cpp

@@ -365,6 +365,7 @@ bool AUD_SoftwareDevice::AUD_SoftwareHandle::seek(float position)
 	if(!m_status)
 		return false;
 
+	m_pitch->setPitch(m_user_pitch);
 	m_reader->seek((int)(position * m_reader->getSpecs().rate));
 
 	if(m_status == AUD_STATUS_STOPPED)