[#4367] Fix segfault in RTP mic fadein method

sflphone-common/src/audio/audiortp/AudioRtpRecordHandler.cpp

@@ -493,7 +493,11 @@ void AudioRtpRecordHandler::processDataDecode(unsigned char *spkrData, unsigned
 
 bool AudioRtpRecordHandler::fadeIn(SFLDataFormat *audio, int size, SFLDataFormat *factor)
 {
-	/*
+
+	// if factor reach 0, this function should no be called anymore
+	if(*factor <= 0)
+		return true;
+
 	// apply amplitude factor;
 	while(size){
 		size--;
@@ -502,13 +506,8 @@ bool AudioRtpRecordHandler::fadeIn(SFLDataFormat *audio, int size, SFLDataFormat
 	// decrease factor
 	*factor /= FADEIN_STEP_SIZE;
 
-	// if factor reach 0, thsi function should no be called anymore
-	if(*factor == 0)
-		return true;
-
 	return false;
-	*/
-	return true;
+
 }
 
 }