[Bug 38445] valgrind shows a couple invalid writes in kernel32/tests/fiber.c

https://bugs.winehq.org/show_bug.cgi?id=38445

--- Comment #1 from Austin English  ---
==8441== Use of uninitialised value of size 4
==8441==    at 0x48ACA26: GetLastError (winbase.h:2819)
==8441==    by 0x48ACA26: test_FiberHandling (???:0)
==8441==    by 0x48AD1A8: func_fiber (fiber.c:225)
==8441==    by 0x49644EC: run_test (test.h:584)
==8441==    by 0x4964926: main (test.h:666)
==8441==  Uninitialised value was created by a stack allocation
==8441==    at 0x425819D: __longjmp (__longjmp.S:55)
==8441==

==8441== Conditional jump or move depends on uninitialised value(s)
==8441==    at 0x48ACCE5: test_FiberLocalStorage (fiber.c:182)
==8441==    by 0x48AD1C4: func_fiber (fiber.c:227)
==8441==    by 0x49644EC: run_test (test.h:584)
==8441==    by 0x4964926: main (test.h:666)
==8441==  Uninitialised value was created by a stack allocation
==8441==    at 0x425819D: __longjmp (__longjmp.S:55)
==8441==

==8441== Use of uninitialised value of size 4
==8441==    at 0x48AD1C8: func_fiber (fiber.c:228)
==8441==    by 0x49644EC: run_test (test.h:584)
==8441==    by 0x4964926: main (test.h:666)
==8441==  Uninitialised value was created by a stack allocation
==8441==    at 0x425819D: __longjmp (__longjmp.S:55)
==8441==

==8441== Use of uninitialised value of size 4
==8441==    at 0x49649B7: __wine_spec_exe_entry (exe_entry.c:38)
==8441==  Uninitialised value was created by a stack allocation
==8441==    at 0x425819D: __longjmp (__longjmp.S:55)
==8441==