Fixes possible switch fall through
Fixes possible switch fall through

This is possibly a pre-historical bug, seems to be in the code base
since the begining of times.

src/ssdp/ssdp_server.c: In function ‘AdvertiseAndReply’:
src/ssdp/ssdp_server.c:245:9: warning: this statement may fall through
[-Wimplicit-fallthrough=]
      if (DeviceUDN && strlen(DeviceUDN) != (size_t)0) {
         ^
src/ssdp/ssdp_server.c:263:5: note: here
     case SSDP_DEVICETYPE: {
     ^~~~

mrjimenez/pupnp,mrjimenez/pupnp,mrjimenez/pupnp,mrjimenez/pupnp