[Cleanup] Add 'override' to virtual functions libs changed for ESPEasy

lib/ESPEasySerial/Driver_ESPEasySC16IS752_Serial.h

@@ -19,10 +19,10 @@ public:
 
   void   begin(long speed);
   void   end();
-  int    peek(void);
+  int    peek(void) override;
   size_t write(uint8_t val) override;
   size_t write(const uint8_t *buffer,
-               size_t         size);
+               size_t         size) override;
   int    read(void) override;
   size_t readBytes(char  *buffer,
                    size_t size) override;

lib/ESPEasySerial/ESPeasySerial.h

@@ -86,12 +86,12 @@ public:
 #endif // ifdef ESP32
 
   void   end();
-  int    peek(void);
+  int    peek(void) override;
   size_t write(uint8_t val) override;
   int    read(void) override;
   int    read(uint8_t *buffer, size_t size);
   int    available(void) override;
-  int    availableForWrite(void);
+  int    availableForWrite(void) override;
   void   flush(void) override;
 
 
@@ -111,7 +111,7 @@ public:
 
   // HardwareSerial specific:
   size_t write(const uint8_t *buffer,
-               size_t         size);
+               size_t         size) override;
   size_t write(const char *buffer);
   int    getBaudRate() const;
 

lib/SerialDevices/SensorSerial.h

@@ -38,15 +38,15 @@ public:
 
   void begin(long speed);
 
-  int peek();
+  int peek() override;
 
-  virtual size_t write(uint8_t byte);
+  virtual size_t write(uint8_t byte) override;
 
-  virtual int read();
+  virtual int read() override;
 
-  virtual int available();
+  virtual int available() override;
 
-  virtual void flush();
+  virtual void flush() override;
 
 };
 

lib/esp8266-oled-ssd1306/OLEDDisplay.h

@@ -248,7 +248,7 @@ class OLEDDisplay : public Print {
     void drawLogBuffer(uint16_t x, uint16_t y);
 
     // Implementent needed function to be compatible with Print class
-    size_t write(uint8_t c);
+    size_t write(uint8_t c) override;
     size_t write(const char* s);
 
     uint8_t            *buffer = NULL;