This method did nothing if its argument was less than the current array size, as it was just a synonym for SetSize() which was documented to behave like this, but this was inconsistent with std::vector and wxVector resize() which does shrink the array, so change wxArray version to shrink it too. Closes #15195. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73986 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775