Add optional clocking for the displays.

Display.cpp

@@ -189,4 +189,10 @@ void CDisplay::clock(unsigned int ms)
 			m_timer2.stop();
 		}
 	}
+
+	clockInt(ms);
+}
+
+void CDisplay::clockInt(unsigned int ms)
+{
 }

Display.h

@@ -62,6 +62,8 @@ protected:
 	virtual void writeFusionInt(const char* source, const char* dest, const char* type, const char* origin) = 0;
 	virtual void clearFusionInt() = 0;
 
+	virtual void clockInt(unsigned int ms);
+
 private:
 	CTimer        m_timer1;
 	CTimer        m_timer2;

HD44780.cpp

@@ -677,6 +677,10 @@ void CHD44780::clearFusionInt()
 	}
 }
 
+void CHD44780::clockInt(unsigned int ms)
+{
+}
+
 void CHD44780::close()
 {
 }

HD44780.h

@@ -73,6 +73,8 @@ protected:
   virtual void writeFusionInt(const char* source, const char* dest, const char* type, const char* origin);
   virtual void clearFusionInt();
 
+  virtual void clockInt(unsigned int ms);
+
 private:
 	unsigned int m_rows;
 	unsigned int m_cols;