fixed warning about size_t

CHG:  warning needs %lu string formatter

client/cmdhficlass.c

@@ -769,7 +769,7 @@ int CmdHFiClassReader_Dump(const char *Cmd) {
 	if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
 	if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
 	
-	printf("Num of bytes:  %u\n", gotBytes);
+	printf("Num of bytes:  %lu\n", gotBytes);
 	
 	// print the dump
 	printf("------+--+-------------------------+\n");