Fix sketch/lcd.cpp:196:1: warning: no return statement in function returning non-void [-Wreturn-type].

Firmware/lcd.cpp

@@ -192,6 +192,7 @@ static void lcd_begin(uint8_t clear)
 static int lcd_putchar(char c, FILE *)
 {
 	lcd_write(c);
+  	return c;
 }
 
 void lcd_init(void)

Firmware/lcd.h

@@ -11,7 +11,6 @@
 extern FILE _lcdout;
 
 #define lcdout (&_lcdout)
-extern int lcd_putchar(char c, FILE *stream);
 
 extern void lcd_init(void);