[Bug 36145] valgrind shows several leaks in imm32/tests/imm32.c

https://bugs.winehq.org/show_bug.cgi?id=36145

--- Comment #1 from Austin English  ---
Still in 1.7.41. Also:
==9087== 188 bytes in 1 blocks are definitely lost in loss record 621 of 859
==9087==    at 0x7BC49E0E: notify_alloc (heap.c:254)
==9087==    by 0x7BC4E044: RtlAllocateHeap (heap.c:1715)
==9087==    by 0x49235D2: create_window_handle (win.c:227)
==9087==    by 0x4926D1E: WIN_CreateWindowEx (win.c:1447)
==9087==    by 0x4927A8D: CreateWindowExW (win.c:1748)
==9087==    by 0x4876295: ImmSetOpenStatus (imm.c:2491)
==9087==    by 0x41FF549: ImmGetContextThreadFunc (imm32.c:458)
==9087==    by 0x7BC8023F: ??? (signal_i386.c:2682)
==9087==    by 0x7BC80286: call_thread_func (signal_i386.c:2741)
==9087==    by 0x7BC8021D: ??? (signal_i386.c:2682)
==9087==    by 0x7BC8726D: start_thread (thread.c:443)
==9087==    by 0x4214EFA: start_thread (pthread_create.c:309)
==9087==    by 0x431362D: clone (clone.S:129)
==9087==