tree cdfe21f9072ebd4d629e9d47b18368e5b6c2ba73
parent bf8b8c8eae8f7df938db8194854d48a57cc3102e
author fujita <fujita@brilliantservice.co.jp> 1333436005 +0900
committer Keun young Park <keunyoung@google.com> 1335489958 -0700

Fix a divide-by-zero case

-modify calculating frame rate per second (FPS)
 to fix divide-by-zero crash issue after too slow task switch.

Signed-off-by: fujita <fujita@brilliantservice.co.jp>