Safari: getCurrentSize fails on display:none elements

[crschmidt]

Elements with display:none set will fail to return the correct value for getCurrentSize in Safari. Hidden elements return 'NaN' for clientWidth (as opposed to '0' from other browsers) so the fallback logic in getCurrentSize is never executed. The Overview Map not working in Safari is a symptom of this bug: because the overview map element is created as display:none, the map has 0 size on creation, and is therefore not displayed correctly.

Confirmed with svn r2301.

[crschmidt]

Fix getCurrentSize for hidden elements in safari

[crschmidt]

Attached patch includes getCurrentSize fix. It also includes a standalone test file. Because our current test framework does not handle safari, this file is not integrated into the existing framework, but instead implements a a single regression test, while allowing for the addition of other safari-only breakages to the file.

[sderle]

Applied as r2206.