Fix condestruct pattern.

* Given how many lines documenting the confusing pattern and how many
  compiler warnings are eliminated by this change...

src/iterator_fallback.c

@@ -11,8 +11,8 @@
 struct CdiFallbackIterator
 {
   CdiIterator super;
-  int streamId, vlistId, subtypeId;
   char *path;  // needed for clone() & serialize()
+  int streamId, vlistId, subtypeId;
 
   int variableCount, curVariable;
   int curLevelCount, curLevel;
@@ -90,7 +90,7 @@ cdiFallbackIterator_clone(CdiIterator *super)
   CdiFallbackIterator *me = (CdiFallbackIterator *) (void *) super;
 
   // Make another stream for this file. This yields an unadvanced iterator.
-  CdiFallbackIterator *clone = (CdiFallbackIterator *) cdiFallbackIterator_new(me->path, me->super.filetype);
+  CdiFallbackIterator *clone = (CdiFallbackIterator *) (void *) cdiFallbackIterator_new(me->path, me->super.filetype);
   if (clone)
     {
       // Point the clone to the same position in the file.