dvbapi: Fix format string used in sscanf().

Use the correct format string for int16_t.
{{{
module-dvbapi.c: In function 'dvbapi_read_priority':
module-dvbapi.c:1222:3: warning: format ‘%x’ expects argument of type 'unsigned int *', but argument 7 has type ‘int16_t *’ [-Wformat=]
   ret = sscanf(str1, "%4x:%6x:%33[^:]:%4x:%4x", &caid, &provid, c_srvid, &ecmpid, &chid);
}}}

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8625 4b0bc96b-bc66-0410-9d44-ebda105a78c1