[PATCH] wininet: Do not call InternetUnlockRequestFile when locking failed.

[Robert Wilhelm]

This should fix crashes on W10L vms, when we pass NULL to InternetUnlockRequestFile after prior lock already failed.
Crashes are here: https://test.winehq.org/data/tests/wininet:http.html
Behavior after crash is here: https://testbot.winehq.org/JobDetails.pl?Key=104580

Signed-off-by: Robert Wilhelm 
---
 dlls/wininet/tests/http.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/dlls/wininet/tests/http.c b/dlls/wininet/tests/http.c
index cf3f62f868a..ee56c64fbd9 100644
--- a/dlls/wininet/tests/http.c
+++ b/dlls/wininet/tests/http.c
@@ -1718,10 +1718,13 @@ static void InternetLockRequestFile_test(void)

ret = InternetLockRequestFile(req.request, &lock2);
     ok(ret, "InternetLockRequestFile returned: %x(%u)\n", ret, GetLastError());
+    ok(lock2 != NULL, "lock2 == NULL\n");
     ok(lock == lock2, "lock != lock2\n");

-    ret = InternetUnlockRequestFile(lock2);
-    ok(ret, "InternetUnlockRequestFile failed: %u\n", GetLastError());
+    if (lock2) {
+        ret = InternetUnlockRequestFile(lock2);
+        ok(ret, "InternetUnlockRequestFile failed: %u\n", GetLastError());
+    }

ret = DeleteFileA(file_name);
     ok(!ret && GetLastError() == ERROR_SHARING_VIOLATION, "Deleting file returned %x(%u)\n", ret, GetLastError());
@@ -1731,8 +1734,12 @@ static void InternetLockRequestFile_test(void)
     ret = DeleteFileA(file_name);
     ok(!ret && GetLastError() == ERROR_SHARING_VIOLATION, "Deleting file returned %x(%u)\n", ret, GetLastError());

-    ret = InternetUnlockRequestFile(lock);
-    ok(ret, "InternetUnlockRequestFile failed: %u\n", GetLastError());
+    ok(lock != NULL, "lock == 0\n");
+    if (lock)
+    {
+        ret = InternetUnlockRequestFile(lock);
+        ok(ret, "InternetUnlockRequestFile failed: %u\n", GetLastError());
+    }

ret = DeleteFileA(file_name);
     ok(ret, "Deleting file returned %x(%u)\n", ret, GetLastError());
--
2.31.1