code sanitizations (compiler warnings)

src/lorawan.cpp

@@ -450,7 +450,7 @@ void myEventCallback(void *pUserData, ev_t ev) {
     snprintf(lmic_event_msg, LMIC_EVENTMSG_LEN, "%-16s",
              evNames[ev] + 3); // +3 to strip "EV_"
   else
-    snprintf(lmic_event_msg, LMIC_EVENTMSG_LEN, "LMIC event %-04u ", ev);
+    snprintf(lmic_event_msg, LMIC_EVENTMSG_LEN, "LMIC event %-4u ", ev);
 
   // process current event message
   switch (ev) {
@@ -468,6 +468,9 @@ void myEventCallback(void *pUserData, ev_t ev) {
     // replace descriptor from library with more descriptive term
     snprintf(lmic_event_msg, LMIC_EVENTMSG_LEN, "%-16s", "JOIN_WAIT");
     break;
+
+  default:
+    break;
   }
 
   // add Lora send queue length to display

src/timesync.cpp

@@ -194,7 +194,7 @@ int recv_timesync_ans(const uint8_t buf[], const uint8_t buf_len) {
     uint32_t timestamp_sec, *timestamp_ptr;
 
     // extract 1 byte timezone from buffer (one step being 15min * 60s = 900s)
-    uint32_t timezone_sec = buf[0] * 900;
+    // uint32_t timezone_sec = buf[0] * 900; // for future use
     buf++;
 
     // extract 4 bytes timestamp from buffer