-- v2: ntdll: Remove tail checking on large blocks. ntdll: Merge common resize case in heap_realloc. ntdll: Call valgrind alloc notifications at the topmost level. ntdll: Correctly free pending pointer in RtlDestroyHeap. ntdll: Split valgrind memory access control to separate helpers. ntdll: Fix handling of back pointer in heap_set_debug_flags.