don't use annoying and unneeded in C++ casts of NULL to "T *" in all other files neither

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/utilsunx.cpp

@@ -202,7 +202,7 @@ void wxMicroSleep(unsigned long microseconds)
     tmReq.tv_nsec = (microseconds % 1000000) * 1000;
 
     // we're not interested in remaining time nor in return value
-    (void)nanosleep(&tmReq, (timespec *)NULL);
+    (void)nanosleep(&tmReq, NULL);
 #elif defined(HAVE_USLEEP)
     // uncomment this if you feel brave or if you are sure that your version
     // of Solaris has a safe usleep() function but please notice that usleep()