use emptyPoint instead of null where applicable.

* also, expected sizes should reflect that we probably
  want to add a dimension or two when creating a PointBuilder.

1 files changed, 3 insertions, 3 deletions

diff --git a/simplemetrics/src/main/java/com/yahoo/metrics/simple/PointBuilder.java b/simplemetrics/src/main/java/com/yahoo/metrics/simple/PointBuilder.java
index 7f6b797c601..a4fb0f370be 100644
--- a/simplemetrics/src/main/java/com/yahoo/metrics/simple/PointBuilder.java
+++ b/simplemetrics/src/main/java/com/yahoo/metrics/simple/PointBuilder.java
@@ -33,8 +33,8 @@ public final class PointBuilder {
         location = new ArrayList<>();
         if (p != null) {
             int size = p.dimensionality();
-            dimensions = new ArrayList<>(size);
-            location = new ArrayList<>(size);
+            dimensions = new ArrayList<>(size+2);
+            location = new ArrayList<>(size+2);
             for (String dimensionName : p.getDimensions()) {
                 dimensions.add(dimensionName);
             }
@@ -103,7 +103,7 @@ public final class PointBuilder {
     public Point build() {
         Point p;
         if (dimensions.size() == 0) {
-            p = null;
+            p = Point.emptyPoint();
         } else {
             p = new Point(dimensions.toArray(dimensionsTypeArgument), location.toArray(locationTypeArgument));
         }