fix post order traversal used for destruction of existing tree

src/hash.c

@@ -36,14 +36,14 @@ main(int argc, char * argv[])
 
     deleted = hashDelete(hash, CSTRA("f9e0g"));
     delete(deleted);
-    //deleted = hashDelete(hash, CSTRA("fcrne9"));
-    //delete(deleted);
-    //deleted = hashDelete(hash, CSTRA("fr09ie"));
-    //delete(deleted);
-    //deleted = hashDelete(hash, CSTRA("jfde9w8"));
-    //delete(deleted);
-    //deleted = hashDelete(hash, CSTRA("j8frheff"));
-    //delete(deleted);
+    deleted = hashDelete(hash, CSTRA("fcrne9"));
+    delete(deleted);
+    deleted = hashDelete(hash, CSTRA("fr09ie"));
+    delete(deleted);
+    deleted = hashDelete(hash, CSTRA("jfde9w8"));
+    delete(deleted);
+    deleted = hashDelete(hash, CSTRA("j8frheff"));
+    delete(deleted);
 
     delete(hash);
     memCleanup();

src/tree/destroy.c

@@ -39,7 +39,8 @@ treeDestroy(Tree * this, TreeAction action)
          * If we come from the right so nothing and go to our
          * next parent.
          */
-        if ((NULL == TREE_LEFT(node) && NULL == TREE_RIGHT(node))
+        if (((NULL == TREE_LEFT(node) || previous == TREE_LEFT(node))
+					&& NULL == TREE_RIGHT(node))
 				|| previous == TREE_RIGHT(node)) {
             
             Tree parent = TREE_PARENT(node);

src/utils/memory.c

@@ -683,7 +683,8 @@ post(struct memSegment * tree, void (*cb)(struct memSegment *, int))
          * If we come from the right so nothing and go to our
          * next parent.
          */
-        if ((NULL == node->left && NULL == node->right)
+        if (((NULL == node->left || previous == node->left)
+					&& NULL == node->right)
                 || previous == node->right) {
 
             struct memSegment * parent = node->parent;