tree 103eef9c210cc44b52004b017a9e2a63ee7a40e4
parent 5f4e21362f040ba70ca9cda6e631e3e14e57b94e
author Ivan Lozano <ivanlozano@google.com> 1513277958 -0800
committer Ivan Lozano <ivanlozano@google.com> 1513278151 -0800

Fix nfcsnoop_cb on overflow sanitized builds.

On builds with integer overflow sanitizer enabled, a runtime error
occurs due to an overflow when calculating a time delta:

 runtime error: unsigned integer overflow: 1513015414325284 -
 1513015414449720 cannot be represented in type 'unsigned long'

This overflow looks benign, so this refactors the code to use the
built-in overflow function so the runtime error no longer occurs.

Bug: 30969751
Test: Compiles, device boots.
Change-Id: I84e2f033c22f94ec3675336a53e50f7f794cb7a6