Fixes crashes in regedit-find affecting CORE-15896 and CORE-18230. After possible RegQueryValueExW append 3 zero bytes to guarantee that we will end with a UNICODE NULL.
* [REGEDIT] Partially Sync to Wine 7.17
- regproc.c and regedit.c are now in sync.
- some other mostly depending fixes for the remaining files
* [REGEDIT_WINETEST] Sync to Wine-7.0
- If we dont select a item as a starting point to search from, we need to set
pszValueName to the first value name in current subkey.
- Check pszSubKey length before calling RegFindRecurse.
- Set focus to subkey when we search for it.