diff -r c3460121ad8b -r 27c0c0095e26 blackbox/lowlevel.h
--- a/blackbox/lowlevel.h	Sat Dec 10 10:51:24 2011 +0100
+++ b/blackbox/lowlevel.h	Sat Dec 10 14:12:09 2011 +0100
@@ -5,7 +5,7 @@
 void LED(uint8_t num, uint8_t state);
 void LEDS_OFF(void);
 void init_hardware(void);
-void check_rails_shortcut(void);
+uint8_t check_rails_shortcut(void);
 
 #endif