Make :find completion work better with the DJGPP build. (Nazri Ramliy)

src/ex_getln.c

@@ -5040,7 +5040,7 @@ globpath(path, file, expand_options)
 	copy_option_part(&path, buf, MAXPATHL, ",");
 	if (STRLEN(buf) + STRLEN(file) + 2 < MAXPATHL)
 	{
-# ifdef WIN3264
+# if defined(MSWIN) || defined(MSDOS)
 	    /* Using the platform's path separator (\) makes vim incorrectly
 	     * treat it as an escape character, use '/' instead. */
 	    if (*buf != NUL && !after_pathsep(buf, buf + STRLEN(buf)))