Bugfix/cppcheck error code fixes (#244)

* Add flawfinder. Add error code for exit status.

* fix errors found by cppcheck

* fix initialization warning in unit test compile

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

src/bacnet/basic/service/h_arf.c

@@ -173,7 +173,7 @@ void handler_atomic_read_file(uint8_t *service_request,
 #if PRINT_ENABLED
                 fprintf(stderr, "ARF: fileStartRecord %d, %u RecordCount.\n",
                     (int)data.type.record.fileStartRecord,
-                    (int)data.type.record.RecordCount);
+                    (unsigned)data.type.record.RecordCount);
 #endif
                 len = arf_ack_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
                     service_data->invoke_id, &data);

src/bacnet/basic/service/h_getevent.c

@@ -55,7 +55,7 @@ void ge_ack_print_data(
     const char *state_strs[] = { "NO", "FA", "ON", "HL", "LL" };
     printf("DeviceID\tType\tInstance\teventState\n");
     printf("--------------- ------- --------------- ---------------\n");
-    int count = 0;
+    unsigned int count = 0;
     while (act_data) {
         printf("%u\t\t%u\t%u\t\t%s\n", device_id,
             act_data->objectIdentifier.type,