Deallocate wxThreadSpecificInfo when wxThread ends.

Cleanup wxThreadSpecificInfo after wxThread::Entry returns to be more
memory efficient.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74834 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/thrimpl.cpp

@@ -342,8 +342,16 @@ wxSemaError wxSemaphore::Post()
 // ----------------------------------------------------------------------------
 
 #include "wx/utils.h"
+#include "wx/private/threadinfo.h"
+#include "wx/scopeguard.h"
 
 void wxThread::Sleep(unsigned long milliseconds)
 {
     wxMilliSleep(milliseconds);
 }
+
+void *wxThread::CallEntry()
+{
+    wxON_BLOCK_EXIT0(wxThreadSpecificInfo::ThreadCleanUp);
+    return Entry();
+}