make netDegug work with MIC_LOGGER

adding a dummy "´flush()" method to NetDebug that does nothing

platformio.ini

@@ -595,6 +595,8 @@ build_flags_min =
   -D USERMOD_AUDIOREACTIVE
   -D UM_AUDIOREACTIVE_USE_NEW_FFT ; use latest (upstream) FFTLib, instead of older library modified by blazoncek. Slightly faster, more accurate, needs 2KB RAM extra   
   -D USERMOD_CUSTOMEFFECTS ; WLEDMM usermod
+  ; -D WLED_DEBUG_HOST='"192.168.xxx.xxx"' ;; to send debug messages over network to host 192.168.x.y - FQDN is also possible
+  ; -D WLED_DEBUG_NET_PORT=1768 ;; port for network debugging. default = 7868
   ; -D WLED_DEBUG ; lots of generic debug messages
   ; -D SR_DEBUG ; some extra debug messages from audioreactive
   ; -D MIC_LOGGER ; for sound input monitoring & debugging (use arduino serial plotter)

wled00/net_debug.h

@@ -11,6 +11,8 @@ class NetworkDebugPrinter : public Print {
   public:
     virtual size_t write(uint8_t c);
     virtual size_t write(const uint8_t *buf, size_t s);
+    virtual void flush(void) { return;}         // WLEDMM adding flush() method - does nothing as we cannot use debugUdp.flush() which clears _input_ buffers
+    virtual void flush( bool txOnly) { return;} // WLEDMM
 };
 
 extern NetworkDebugPrinter NetDebug;