sdp.js: Use parseInt() on media description port value
sdp.js: Use parseInt() on media description port value

Closes #468

stefhak/openwebrtc,multipath-rtp/openwebrtc,ford-prefect/openwebrtc,ford-prefect/openwebrtc,tymiles003/openwebrtc,stefhak/openwebrtc,tymiles003/openwebrtc,Jonekee/openwebrtc,ford-prefect/openwebrtc,danielwegener/openwebrtc,alessandrod/openwebrtc,Jonekee/openwebrtc,multipath-rtp/openwebrtc,adozenlines/openwebrtc,pererikb/openwebrtc,philn/openwebrtc,danielwegener/openwebrtc,Jonekee/openwebrtc,mayank-kratin/openwebrtc,adozenlines/openwebrtc,philn/openwebrtc,mayank-kratin/openwebrtc,pererikb/openwebrtc,stefhak/openwebrtc,shakin/openwebrtc,philn/openwebrtc,shoreflyer/openwebrtc,tymiles003/openwebrtc,felipeardila1010/openwebrtc,EricssonResearch/openwebrtc,skyfe79/openwebrtc,skyfe79/openwebrtc,EricssonResearch/openwebrtc,danielwegener/openwebrtc,Jonekee/openwebrtc,tymiles003/openwebrtc,adozenlines/openwebrtc,alessandrod/openwebrtc,alessandrod/openwebrtc,shoreflyer/openwebrtc,multipath-rtp/openwebrtc,shoreflyer/openwebrtc,EricssonResearch/openwebrtc,stefhak/openwebrtc,pererikb/openwebrtc,mayank-kratin/openwebrtc,shakin/openwebrtc,Jonekee/openwebrtc,felipeardila1010/openwebrtc,danielwegener/openwebrtc,ford-prefect/openwebrtc,tymiles003/openwebrtc,skyfe79/openwebrtc,skyfe79/openwebrtc,skyfe79/openwebrtc,mayank-kratin/openwebrtc,ford-prefect/openwebrtc,shoreflyer/openwebrtc,shakin/openwebrtc,stefhak/openwebrtc,felipeardila1010/openwebrtc,felipeardila1010/openwebrtc,ford-prefect/openwebrtc,1yvT0s/openwebrtc,shoreflyer/openwebrtc,Jonekee/openwebrtc,adozenlines/openwebrtc,mayank-kratin/openwebrtc,shakin/openwebrtc,philn/openwebrtc,adozenlines/openwebrtc,alessandrod/openwebrtc,multipath-rtp/openwebrtc,philn/openwebrtc,1yvT0s/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc,multipath-rtp/openwebrtc,shoreflyer/openwebrtc,EricssonResearch/openwebrtc,multipath-rtp/openwebrtc,adozenlines/openwebrtc,alessandrod/openwebrtc,philn/openwebrtc,philn/openwebrtc,alessandrod/openwebrtc,1yvT0s/openwebrtc,shakin/openwebrtc,shakin/openwebrtc,skyfe79/openwebrtc,pererikb/openwebrtc,multipath-rtp/openwebrtc,1yvT0s/openwebrtc,1yvT0s/openwebrtc,danielwegener/openwebrtc,EricssonResearch/openwebrtc,felipeardila1010/openwebrtc,shoreflyer/openwebrtc,danielwegener/openwebrtc,mayank-kratin/openwebrtc,pererikb/openwebrtc,stefhak/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc,tymiles003/openwebrtc,felipeardila1010/openwebrtc,1yvT0s/openwebrtc