* #5950: remove "converting to non-pointer type 'int' from NULL" warnings

This consists of using 0 instead of NULL where necessary

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

@@ -299,7 +299,7 @@ void AudioRtpFactory::updateDestinationIpAddress (void)
 
 sfl::AudioSymmetricRtpSession * AudioRtpFactory::getAudioSymetricRtpSession()
 {
-    if ( (_rtpSessionType == Symmetric) && (_rtpSessionType != NULL)) {
+    if ( (_rtpSessionType == Symmetric) && (_rtpSessionType != 0)) {
         return static_cast<AudioSymmetricRtpSession *> (_rtpSession);
     } else {
         throw AudioRtpFactoryException ("RTP: Error: _rtpSession is NULL in getAudioSymetricRtpSession");
@@ -308,7 +308,7 @@ sfl::AudioSymmetricRtpSession * AudioRtpFactory::getAudioSymetricRtpSession()
 
 sfl::AudioZrtpSession * AudioRtpFactory::getAudioZrtpSession()
 {
-    if ( (_rtpSessionType == Zrtp) && (_rtpSessionType != NULL)) {
+    if ( (_rtpSessionType == Zrtp) && (_rtpSessionType != 0)) {
         return static_cast<AudioZrtpSession *> (_rtpSession);
     } else {
         throw AudioRtpFactoryException ("RTP: Error: _rtpSession is NULL in getAudioZrtpSession");

sflphone-common/src/call.h

@@ -40,7 +40,7 @@
 #define SIP_SCHEME       "sip:"
 #define SIPS_SCHEME      "sips:"
 
-#define CallConfigNULL   NULL
+#define CallConfigNULL   0
 
 /*
  * @file call.h

sflphone-common/src/iax/iaxvoiplink.cpp

@@ -62,7 +62,7 @@ IAXVoIPLink::IAXVoIPLink (const AccountID& accountID) : VoIPLink (accountID)
     , spkrDataDecoded (NULL)
     , spkrDataConverted (NULL)
     , converter (NULL)
-    , converterSamplingRate (NULL)
+    , converterSamplingRate (0)
     , urlhook (NULL)
 {
     _evThread = new EventThread (this);