openssl: fix some uninitialized memory use
openssl: fix some uninitialized memory use

g_tls_database_openssl_initable_init() is returning uninitialized memory
on its success path. For me, result is usually 0, causing the call to
fail. But for Ignacio, it's nonzero, causing the call to succeed.

GNOME/glib-networking,GNOME/glib-networking,GNOME/glib-networking