fix wording

Author: Vladimir Kotal

user-access.tex

@@ -131,7 +131,7 @@
 user information, see page \pageref{name_service_switch} for more information on
 naming databases.
 \item All these functions are part of POSIX 1003.1-2008.
-\item \funnm{setpwent}() must be call before the first call to
+\item \funnm{setpwent}() must be called before the first call to
 \funnm{getpwent}().
 \item There are also functions \funnm{getgrnam}() and \funnm{getgrent}() which
 can be used to get group information.