[PATCH] wininet/test: Check null pointer in InternetGetSecurityInfoByURLW

[Jacek Caban]

From: Wei Xie <xiewei(a)deepin.com>

Signed-off-by: Wei xie <xiewei(a)linuxdeepin.com>
Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---

My changes:
- don't test last error on success
- fixed cert chain leak in tests
- don't duplicate cert chain if we know that it's not needed

 dlls/wininet/internet.c   | 15 ++++++++-------
 dlls/wininet/tests/http.c | 12 ++++++++++++
 2 files changed, 20 insertions(+), 7 deletions(-)