optimize size, and make debug and ftl stuff optional

avr/usbload/debug.c

@@ -31,12 +31,10 @@ extern FILE uart_stdout;
 extern int debug_level; /* the higher, the more messages... */
 
 #if defined(NO_DEBUG) && defined(__GNUC__)
-/* Nothing. debug has been "defined away" in debug.h already. */
 #else
 void debug(int level, char* format, ...) {
 #ifdef NO_DEBUG
-    /* Empty body, so a good compiler will optimise calls
-       to pmesg away */
+
 #else
     va_list args;
     if (!(debug_level & level))
@@ -44,8 +42,8 @@ void debug(int level, char* format, ...) {
     va_start(args, format);
     vprintf(format, args);
     va_end(args);
-#endif /* NDEBUG */
-#endif /* NDEBUG && __GNUC__ */
+#endif 
 }
+#endif