fix some very pedantic warnings

Author: mulle-nat

.mulle/share/env/environment-plugin.sh

@@ -8,7 +8,7 @@
 #
 cmake_minimum_required( VERSION 3.13)
 
-project( mulle-linkedlist VERSION 0.0.4 LANGUAGES C)
+project( mulle-linkedlist VERSION 0.0.5 LANGUAGES C)
 
 # if use embedded project with symlinks and you want to distribute their
 # headers you probably need to turn this on

.mulle/share/env/environment.sh

@@ -1,6 +1,6 @@
 {
    "name" : "mulle-linkedlist",
-   "version" : "0.0.4",
+   "version" : "0.0.5",
    "description" : "🔂 mulle-linkedlist a wait and lock-free linked list",
    "keywords" : [],
    "license" : "BSD-3-Clause",