Update packet.h

Author: JonnyKong

TextConferencingLab/LAB2/packet.h

@@ -65,7 +65,7 @@ void packetToString(const Packet *packet, char *dest) {
 void stringToPacket(const char *str, Packet *dest_packet) {
 
  memset(dest_packet -> data, 0, MAX_DATA);
-
+if (strlen(str) == 0) return;
  // Compile Regex to match ":"
  regex_t regex;
  if(regcomp(&regex, "[:]", REG_EXTENDED)) {