Fixed HardwareSerial bug introduced in 1.5.3.

Fixes #1568

Author: cmaglie

build/shared/revisions.txt

@@ -8,6 +8,9 @@ ARDUINO 1.5.4 BETA
 * sam: fixed wrong SPI initialization (noblepepper)
 * updated all instances of Adafruit_GFX to the latest version
 
+[core]
+* avr: fixed bug introduced with recent optimizations in HardwareSerial (atmega8 cpu) (darryl)
+
 ARDUINO 1.5.3 BETA 2013.08.30
 
 [ide]

hardware/arduino/avr/cores/arduino/HardwareSerial.cpp

@@ -91,7 +91,7 @@ inline void store_char(unsigned char c, HardwareSerial *s)
   #elif defined(UDR)
     if (bit_is_clear(UCSRA, PE)) {
       unsigned char c = UDR;
-      store_char(c, &rx_buffer);
+      store_char(c, &Serial);
     } else {
       unsigned char c = UDR;
     };