No real changes, just avoid an unnecessary heap allocation in a test.

No real changes, just avoid an unnecessary heap allocation in a test.

We don't need to allocate the locale object in StringTestCase::ToDouble() on
the heap (and then delete it -- or not, if an assertion fails before the
function end), it's enough and simpler to just create it as a local variable.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64447 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775