ui: Fix crash when rendering actual frame slices

Change-Id: I302665db320ea2f9684943ef1f72c3c95007e0d8
diff --git a/ui/src/tracks/actual_frames/controller.ts b/ui/src/tracks/actual_frames/controller.ts
index 7c81ae3..b436fbe 100644
--- a/ui/src/tracks/actual_frames/controller.ts
+++ b/ui/src/tracks/actual_frames/controller.ts
@@ -59,7 +59,7 @@
       SELECT
         (s.ts + ${bucketNs / 2}) / ${bucketNs} * ${bucketNs} as tsq,
         s.ts,
-        max(iif(s.dur = -1, (SELECT end_ts FROM trace_bounds) - ts, s.dur)) 
+        max(iif(s.dur = -1, (SELECT end_ts FROM trace_bounds) - s.ts, s.dur))
             as dur,
         s.layout_depth,
         s.name,