RMDir /r does not remove files with Unicode names

When the user creates files or directories with
localised names (eg Chinese, Korean) those files and
directories are not properly removed.

Proposed solution:

in Source\exehead\util.c, in the myDelete function
remove the files by their short filename.

void NSISCALL myDelete(char *buf, int flags)
{
static char lbuf[NSIS_MAX_STRLEN];

HANDLE h;
WIN32_FIND_DATA fd;
char *fn;
char *pFName; // <------ new line
int valid_dir=is_valid_instpath(buf);

...
...

pFName = fd.cAlternateFileName[0] == '\0' ?
fd.cFileName : fd.cAlternateFileName;
#ifdef NSIS_SUPPORT_RMDIR
if (pFName[0] != '.' ||
(pFName[1] != '.' && pFName[1]))
#endif//NSIS_SUPPORT_RMDIR
{
mystrcpy(fn,pFName);

My email is fuxiulian@yahoo.com if you want to contact me.