Enhance 'boolean' comparison
Enhance 'boolean' comparison

DrumTechnologiesLtd/JsSIP,voxbone/JsSIP,onsip/SIP.js,dpocock/JsSIP,AaronZhangL/JsSIP,CodeYellowBV/JsSIP,vconsult/JsSIP,onsip/SIP.js,rusekr/JsSIP,Escaux/SIP.js,Voiceworks/SIP.js,tqcenglish/JsSIP,josephfrazier/SIP.js,markandrus/SIP.js,ronlobo/SIP.js,joseph-onsip/SIP.js