comctl32: Allocate new memory in notify_forward_header() to avoid Free() on wrong pointer. (Valgrind).

This patch adds additional tests, to check how debuggers handle
OUTPUT_DEBUG_STRING_EVENT events.

ntdll/tests: Use an EXCEPTION_REGISTRATION_RECORD array to prevent compiler from reordering variables.

ole32: Treat STG_E_LOCKVIOLATION the same way as STG_E_ACCESSDENIED as both indicate locking contention.