Fix spec for ImageCollection#length afte adding another image to images.html.
Fix spec for ImageCollection#length afte adding another image to images.html.

abotalov/watir-webdriver,jkotests/watir,titusfortner/watir-webdriver,titusfortner/watir,watir/watir,titusfortner/watir,abotalov/watir-webdriver,titusfortner/watir,abotalov/watir-webdriver,jkotests/watir,jkotests/watir-webdriver,abotalov/watir-webdriver,jkotests/watir,watir/watir,jkotests/watir-webdriver,watir/watir,watir/watir,titusfortner/watir-webdriver,jkotests/watir,titusfortner/watir