* lang.h: fix various preprocessor usages of new public

symbols to expect 0 or 1 values rather than 1 or undefined.
i.e. change #ifdef to #if, etc.

diff --git a/libguile/lang.h b/libguile/lang.h
index 07585bc..e9d965e 100644 (file)
--- a/libguile/lang.h
+++ b/libguile/lang.h
@@ -50,7 +50,7 @@
 
 \f
 
-#ifdef SCM_ENABLE_ELISP
+#if SCM_ENABLE_ELISP
 
 #define SCM_NILP(x) (SCM_EQ_P ((x), SCM_ELISP_NIL))