w32: Do not error out if gpgconf is not installed.
* common/homedir.c (check_portable_app): Remove error message.
It is sometimes useful to install just gpgv and no other parts. Our
test for a portable application returned an error if gpgconf is not
installed. That error is not required but was merely a debug aid.
- Signed-off-by: Werner Koch <firstname.lastname@example.org>