Fixed SerialStream driver blocking while waiting for characters to be received...

Fixed SerialStream driver blocking while waiting for characters to be received instead of returning EOF.

LUFA/Drivers/Peripheral/SerialStream.c

@@ -44,6 +44,9 @@ static int SerialStream_TxByte(char DataByte, FILE *Stream)
 static int SerialStream_RxByte(FILE *Stream)
 {
 	(void)Stream;
+	
+	if (!(Serial_IsCharReceived()))
+	  return EOF;
 
 	return Serial_RxByte();
 }

LUFA/ManPages/ChangeLog.txt

@@ -53,6 +53,7 @@
   *  - Fixed Pipe_IsEndpointBound() not taking the endpoint's direction into account
   *  - Fixed EEPROM and FLASH ISP programming in the AVRISP project
   *  - Fixed incorrect values of USB_CONFIG_ATTR_SELFPOWERED and USB_CONFIG_ATTR_REMOTEWAKEUP tokens (thanks to Claus Christensen)
+  *  - Fixed SerialStream driver blocking while waiting for characters to be received instead of returning EOF
   *
   *  \section Sec_ChangeLog091223 Version 091223
   *