Fix warning -Wempty-body by adding braces to 'if' stmt body (#2951)

Author: MartyMacGyver

libraries/WiFi/src/WiFiGeneric.cpp

@@ -333,7 +333,9 @@ const char * system_event_reasons[] = { "UNSPECIFIED", "AUTH_EXPIRE", "AUTH_LEAV
 #endif
 esp_err_t WiFiGenericClass::_eventCallback(void *arg, system_event_t *event)
 {
-    if(event->event_id < 26) log_d("Event: %d - %s", event->event_id, system_event_names[event->event_id]);
+    if(event->event_id < 26) {
+        log_d("Event: %d - %s", event->event_id, system_event_names[event->event_id]);
+    }
     if(event->event_id == SYSTEM_EVENT_SCAN_DONE) {
         WiFiScanClass::_scanDone();