test_initconfig_get_api fails on platforms where malloc(0) returns NULL

Bug report

Bug description:

test_initconfig_get_api (Programs/_testembed.c) executes the code

    assert(PyInitConfig_GetStrList(config, "xoptions", &length, &items) == 0);
    assert(length == 0);

PyInitConfig_GetStrList has malloc

*items = malloc(list->length * sizeof(char*));

if length is zero the behavior of malloc(0) is implementation defined, this seems to be problematic on platforms where malloc of zero returns NULL.

CPython versions tested on:

3.14

Operating systems tested on:

Other

Linked PRs

• gh-153816

从 Programs/_testembed.c 中的 test_initconfig_get_api 开始，跟踪针对长度为零的 xoptions 列表的 PyInitConfig_GetStrList 调用。检查在 malloc(0) 返回 NULL 的平台上该实现的分配行为，然后运行目标测试，确认测试通过且不改变预期的零长度。