Bugfix T41133: Audio: Speakers with animated pitch cause clicks in rendered animations, crashes or huge filesizes in rendered audio

Crash happened when the pitch value got <= 0, preventing this now.

intern/audaspace/FX/AUD_PitchReader.cpp

@@ -48,5 +48,7 @@ float AUD_PitchReader::getPitch() const
 
 void AUD_PitchReader::setPitch(float pitch)
 {
+	if(pitch <= 0)
+		pitch = 1;
 	m_pitch = pitch;
 }

intern/audaspace/intern/AUD_SoftwareDevice.cpp

@@ -422,6 +422,8 @@ bool AUD_SoftwareDevice::AUD_SoftwareHandle::setPitch(float pitch)
 {
 	if(!m_status)
 		return false;
+	if(pitch <= 0)
+		pitch = 1;
 	m_user_pitch = pitch;
 	return true;
 }