[#2402] Code indentation

sflphone-common/src/audio/alsa/alsalayer.cpp

sflphone-common/src/audio/audiolayer.cpp

sflphone-common/src/audio/audiortp.cpp

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

sflphone-common/src/audio/codecs/codecDescriptor.cpp

sflphone-common/src/audio/codecs/speexcodec_nb.cpp

sflphone-common/src/audio/codecs/speexcodec_wb.cpp

sflphone-common/src/audio/dcblocker.cpp

sflphone-common/src/audio/mainbuffer.cpp

sflphone-common/src/audio/pulseaudio/audiostream.cpp

sflphone-common/src/audio/pulseaudio/pulselayer.cpp

sflphone-common/src/audio/recordable.cpp

sflphone-common/src/audio/ringbuffer.cpp

sflphone-common/src/call.cpp

sflphone-common/src/conference.cpp

sflphone-common/src/dbus/callmanager.cpp

sflphone-common/src/iax/iaxcall.cpp

sflphone-common/src/iax/iaxvoiplink.cpp

sflphone-common/src/main.cpp

sflphone-common/src/managerimpl.cpp