fix: exception in newly added segmentations (#5198)

extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts

@@ -1765,7 +1765,7 @@ class SegmentationService extends PubSubService {
 
     const { cachedStats } = segments[segmentIndex];
 
-    if (!cachedStats) {
+    if (!cachedStats || !cachedStats?.center || !cachedStats?.namedStats?.center) {
       return;
     }