Avoid warning about empty structures and always define CHECKED_PTR_OF

crypto/lhash/lhash.h

@@ -198,7 +198,7 @@ void lh_node_usage_stats_bio(const _LHASH *lh, BIO *out);
 
 #define LHASH_OF(type) struct lhash_st_##type
 
-#define DECLARE_LHASH_OF(type) LHASH_OF(type) { }
+#define DECLARE_LHASH_OF(type) LHASH_OF(type) { int dummy; }
 
 #define CHECKED_LHASH_OF(type,lh) \
   ((_LHASH *)CHECKED_PTR_OF(LHASH_OF(type),lh))

crypto/stack/safestack.h

@@ -57,13 +57,13 @@
 
 #include <openssl/stack.h>
 
-#ifdef DEBUG_SAFESTACK
-
 #ifndef CHECKED_PTR_OF
 #define CHECKED_PTR_OF(type, p) \
     ((void*) (1 ? p : (type*)0))
 #endif
 
+#ifdef DEBUG_SAFESTACK
+
 #define CHECKED_SK_FREE_FUNC(type, p) \
     ((void (*)(void *)) ((1 ? p : (void (*)(type *))0)))