Fixes various warnings noticed on Windows (#425)

* Fixes various warnings noticed on Windows

- Adds a prototype for our implementation of vasprintf
- Return type of H5_get_utf16_str() is now non-const
- Fixes possible uninitialized return type in Wremove_utf8
- Better isolation of fork() code in accum.c:test_swmr_write_big()
- Better isolation of non-zlib code in dsets.c:test_filter_delete()
- Removed unused variable in trefer.c:test_reference_cmpnd_obj()

* Fixes clang-format issues

1 files changed, 4 insertions, 3 deletions

diff --git a/src/H5win32defs.h b/src/H5win32defs.h
index b4b253f..8f3947a 100644
--- a/src/H5win32defs.h
+++ b/src/H5win32defs.h
@@ -176,9 +176,10 @@ H5_DLL int    c99_snprintf(char *str, size_t size, const char *format, ...);
 H5_DLL int    c99_vsnprintf(char *str, size_t size, const char *format, va_list ap);
 H5_DLL int    Wnanosleep(const struct timespec *req, struct timespec *rem);
 H5_DLL herr_t H5_expand_windows_env_vars(char **env_var);
-H5_DLL const wchar_t *H5_get_utf16_str(const char *s);
-H5_DLL int            Wopen_utf8(const char *path, int oflag, ...);
-H5_DLL int            Wremove_utf8(const char *path);
+H5_DLL wchar_t *H5_get_utf16_str(const char *s);
+H5_DLL int      Wopen_utf8(const char *path, int oflag, ...);
+H5_DLL int      Wremove_utf8(const char *path);
+H5_DLL int      H5_get_win32_times(H5_timevals_t *tvs);
 
 /* Round functions only needed for VS2012 and earlier.
  * They are always built to ensure they don't go stale and