Clamp test time to positive values.

If there is some jitter in the sync time, operations can complete in a
negative amount of time (confusing both humans and x11perfcomp).

Signed-off-by: Peter Harris <pharris@opentext.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/x11perf.c b/x11perf.c
index 08c0062..c1fb5c2 100644
--- a/x11perf.c
+++ b/x11perf.c
@@ -647,6 +647,7 @@ DoTest(XParms xp, Test *test, int reps)
     HardwareSync(xp);
 
     time = ElapsedTime(syncTime);
+    if (time < 0.0) time = 0.0;
     CheckAbort ();
     if (drawToFakeServer)
         XQueryBestSize(xp->d, TileShape, tileToQuery,