[Bug 36310] valgrind shows lots of uninitialized reads/writes in msxml3/tests/xmlview.c

https://bugs.winehq.org/show_bug.cgi?id=36310

--- Comment #1 from Austin English  ---
==7925== Conditional jump or move depends on uninitialised value(s)
==7925==    at 0x6AEE5337: ???
==7925==    by 0x69ECD001: ???
==7925==    by 0x6A1714F7: ???
==7925==    by 0x6A36FB0A: ???
==7925==    by 0x6AECA4E7: ???
==7925==    by 0x6AECA48F: ???
==7925==    by 0x69CAB81E: ???
==7925==    by 0x6A0E65B1: ???
==7925==    by 0x69D80A6F: ???
==7925==    by 0x5768509: ??? (winproc.c:173)
==7925==    by 0x576867E: call_window_proc (winproc.c:244)
==7925==    by 0x576986C: WINPROC_CallProcAtoW (winproc.c:603)
==7925==    by 0x576A911: WINPROC_call_window (winproc.c:911)
==7925==    by 0x572B8F9: DispatchMessageA (message.c:3948)
==7925==    by 0x4CA7928: test_Load (xmlview.c:247)
==7925==    by 0x4CA7B6E: func_xmlview (xmlview.c:270)
==7925==    by 0x4CA896C: run_test (test.h:584)
==7925==    by 0x4CA8D5B: main (test.h:654)
==7925==  Uninitialised value was created by a client request
==7925==    at 0x7BC4C52C: mark_block_uninitialized (heap.c:209)
==7925==    by 0x7BC4C697: initialize_block (heap.c:240)
==7925==    by 0x7BC50FA3: RtlAllocateHeap (heap.c:1717)
==7925==    by 0x76D1CE0: MSVCRT_malloc (heap.c:329)
==7925==    by 0x61E426BF: ???
==7925==    by 0x69D2235D: ???
==7925==    by 0x6A74092C: ???
==7925==    by 0x6A5B7D64: ???
==7925==    by 0x69C860AB: ???
==7925==    by 0x6B073403: ???
==7925==    by 0x6A4BD183: ???
==7925==    by 0x6AFE511D: ???
==7925==    by 0x69CAB81E: ???
==7925==    by 0x6A0E65B1: ???
==7925==    by 0x69D80A6F: ???
==7925==    by 0x5768509: ??? (winproc.c:173)
==7925==    by 0x576867E: call_window_proc (winproc.c:244)
==7925==    by 0x576986C: WINPROC_CallProcAtoW (winproc.c:603)
==7925==    by 0x576A911: WINPROC_call_window (winproc.c:911)
==7925==    by 0x572B8F9: DispatchMessageA (message.c:3948)
==7925==