Since being able to access the 64 bit registry from 32 bit code and vice
versa (a5c468483d) the updated code in wxRegKey::DeleteKey hasn't worked
properly for keys that are redirected. It is for example not possible
from 32 bit code to delete keys from the 64 bit view of (parts of)
HKLM/SOFTWARE/ . And in 64 bit code it's not possible to delete keys
from the 32 bit view of HKLM/SOFTWARE/ which is at
HKLM/SOFTWARE/WOW6432Node/ . Fix by trying to call the correct DLL
function (RegDeleteKeyExW or RegDeleteKeyExA), instead of non-existing
RegDeleteKeyEx.
8d2ed7bdf0