don't declare pthread_mutexattr_settype() ourselves if the system already does it, we might have a slightly different declaration and this causes problems

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35702 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/threadpsx.cpp

@@ -170,7 +170,8 @@ private:
     friend class wxConditionInternal;
 };
 
-#ifdef HAVE_PTHREAD_MUTEXATTR_T
+#if defined(HAVE_PTHREAD_MUTEXATTR_T) && \
+        wxUSE_UNIX && !defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE_DECL)
 // on some systems pthread_mutexattr_settype() is not in the headers (but it is
 // in the library, otherwise we wouldn't compile this code at all)
 extern "C" int pthread_mutexattr_settype(pthread_mutexattr_t *, int);