master eb7df2a: Improve tv_nsec doc

[Paul Eggert]

branch: master
commit eb7df2a4e304c7e2c35eb4df63056c98ee6324e9
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>

    Improve tv_nsec doc
    
    * doc/lispref/internals.texi (Module Values):
    Document tv_nsec more accurately.
---
 doc/lispref/internals.texi | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/doc/lispref/internals.texi b/doc/lispref/internals.texi
index 0135046..eed9cb0 100644
--- a/doc/lispref/internals.texi
+++ b/doc/lispref/internals.texi
@@ -1528,8 +1528,11 @@ following members:
 @item time_t tv_sec
 Whole number of seconds.
 @item long tv_nsec
-Fractional seconds as number of nanoseconds, always less than one
-billion.
+Fractional seconds as a number of nanoseconds.
+For timestamps returned by @code{extract_time},
+this is always nonnegative and less than one billion.
+(Although POSIX requires the type of @code{tv_nsec} to be @code{long},
+the type is @code{long long} on some nonstandard platforms.)
 @end table
 
 @noindent