Testbot crash during advapi32 LockDatabase or security test

The failure takes one of (at least) two forms:

• Kernel-mode access violation with a corrupted stack trace showing CmpInitializeMachineDependentConfiguration, during advapi32_winetest:security, e.g. http://build.reactos.org:8010/builders/Windows_AMD64_1%20VBox-Test/builds/6159/steps/test/logs/stdio
• BAD_POOL_HEADER (argument: 3) bug check while mapping a section view during advapi32_apitest:LockDatabase, e.g. http://build.reactos.org:8010/builders/Windows_AMD64_1%20VBox-Test/builds/6161/steps/test/logs/stdio

Seems to be around since some time around r56810 (it's possible that the LockDatabase test brought this bug out of hiding).