Reverted intervalTree update

Author: PatrickNorton

thirdparty/intervaltree/IntervalTree.h

@@ -67,7 +67,7 @@ class IntervalTree {
         center = other.center;
         intervals = other.intervals;
         if (other.left) {
-            left = new intervalTree();
+            left = (intervalTree*) malloc(sizeof(intervalTree));
             *left = *other.left;
         } else {
             left = NULL;