Avoid warnings with -pedantic, specifically:

Conversion between void * and function pointer.
Value computed not used.
Signed/unsigned argument.
diff --git a/apps/openssl.c b/apps/openssl.c
index dcfb796..8323b59 100644
--- a/apps/openssl.c
+++ b/apps/openssl.c
@@ -618,7 +618,7 @@
 		return(NULL);
 
 	for (f=functions; f->name != NULL; f++)
-		lh_FUNCTION_insert(ret,f);
+		(void)lh_FUNCTION_insert(ret,f);
 	return(ret);
 	}