Any valid code page value name in System\CurrentControlSet\Control\Nls\CodePage
is a string representation of its corresponding decimal value, that
cannot be larger than MAXUSHORT == 65535, i.e. longer than 5+1
characters.
Noticed with the analyser warning
dll\cpl\console\options.c(74): warning C6262: Function uses '32808' bytes
of stack: exceeds /analyze:stacksize '16384'. Consider moving some data to heap.
Make the enumeration loop actually stop when ERROR_NO_MORE_ITEMS is
returned. If we got another error, e.g. because the value name was
too long (and thus, an invalid code page), just ignore and continue
looping.