Replaced IsLocked with IsOk in 2.8 docs (was already fixed in trunk).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@57860 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/mutexlck.tex

@@ -26,7 +26,7 @@ None.
 \func{}{wxMutexLocker}{\param{wxMutex\&}{ mutex}}
 
 Constructs a wxMutexLocker object associated with mutex and locks it.
-Call \helpref{IsLocked}{wxmutexlockerisok} to check if the mutex was
+Call \helpref{IsOk}{wxmutexlockerisok} to check if the mutex was
 successfully locked.
 
 \membersection{wxMutexLocker::\destruct{wxMutexLocker}}\label{wxmutexlockerdtor}