Update packet.cc

packet.cc

@@ -176,6 +176,7 @@ void write_packets(const char filename[], const Packet *const pkt) {
     fprintf(packets_file, "%d ", static_cast<int>(pkt[i].type));
     fprintf(packets_file, "%lg %lg %lg ", pkt[i].pos[0], pkt[i].pos[1], pkt[i].pos[2]);
     fprintf(packets_file, "%lg %lg %lg ", pkt[i].dir[0], pkt[i].dir[1], pkt[i].dir[2]);
+    fprintf(packets_file, "%d ", 0);  // last_cross is not used in the current version
     fprintf(packets_file, "%g ", pkt[i].tdecay);
     fprintf(packets_file, "%g ", pkt[i].e_cmf);
     fprintf(packets_file, "%g ", pkt[i].e_rf);
@@ -277,6 +278,9 @@ void read_packets(const char filename[], Packet *pkt) {
 
     ssline >> pkt[i].dir[0] >> pkt[i].dir[1] >> pkt[i].dir[2];
 
+    int last_cross_in = 0;
+    ssline >> last_cross_in;  // last_cross is not used in the current version
+
     ssline >> pkt[i].tdecay;
 
     ssline >> pkt[i].e_cmf >> pkt[i].e_rf >> pkt[i].nu_cmf >> pkt[i].nu_rf;