Fix yellow in sim builds

Change-Id: Ibed5ca7a821a31128940d602ade75497c13631f5
diff --git a/lib/skin_parser/skin_debug.c b/lib/skin_parser/skin_debug.c
index e174602..77a21fd 100644
--- a/lib/skin_parser/skin_debug.c
+++ b/lib/skin_parser/skin_debug.c
@@ -43,7 +43,7 @@
 static inline struct skin_element*
 get_child(OFFSETTYPE(struct skin_element**) children, int child)
 {
-    if (children == NULL)
+    if ((void*)children == NULL) // Stupid type shenanigans
         return NULL;
 
     struct skin_element **kids = SKINOFFSETTOPTR(skin_buffer, children);