Chameleon: Fix a minor bug.

Fix a bug in check_external_display_connector function.

BUG=None
TEST=manually run the test on peppy and see it passed.

Change-Id: I3c6fcd15b010870e914056e369b242722df3ce89
Reviewed-on: https://chromium-review.googlesource.com/211791
Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Tested-by: Ting-Yuan Cheng <tingyuan@chromium.org>
Commit-Queue: Ting-Yuan Cheng <tingyuan@chromium.org>
1 file changed