Feature puff: unconditionally have one symbol

src/sc_builtin/sc_puff.h

@@ -33,10 +33,12 @@
 
 /* every libsc file includes at least sc_config.h */
 #include <sc_config.h>
-#ifdef SC_HAVE_ZLIB
-/* puff is not necessary and not used in the library */
+
+/** Make sure there is at least one symbol in the file. */
 extern const int      sc_puff_dummy;
-#else
+
+#ifndef SC_HAVE_ZLIB
+/* sc_puff is a fallback for the zlib uncompress function */
 
 /* convenient define for code to fallback even further without puff */
 #define SC_PUFF_INCLUDED

src/sc_puff.c

@@ -35,13 +35,14 @@
  *     inclusion, an extern "C", and white space.
  */
 
-#include <sc_config.h>
-#ifdef SC_HAVE_ZLIB
-/* make sure the file contains at least one symbol */
+#include "sc_builtin/sc_puff.h"         /* prototype for sc_puff() */
+
+/* Make sure there is at least one symbol in the file. */
 const int             sc_puff_dummy = 1;
-#else
 
-#include "sc_builtin/sc_puff.h"         /* prototype for sc_puff() */
+#ifdef SC_PUFF_INCLUDED
+/* sc_puff is a fallback for the zlib uncompress function */
+
 #ifndef NIL
 #  define NIL ((unsigned char *)0)      /* for no output option */
 #endif