OW warning fix. Our compile time asserts warns when used within function and dedicated #pragma seems not influence it so they are moved from functions into global space as near as possible.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30009 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/thread.h

@@ -32,6 +32,10 @@
     #undef Yield
 #endif
 
+#ifdef __WXMSW__
+    #include "wx/msw/wrapwin.h"
+#endif
+
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
@@ -243,8 +247,7 @@ private:
     // include windows.h from this public header and we also have to use the
     // union to force the correct (i.e. maximal) alignment
     //
-    // if CRITICAL_SECTION size changes in Windows, you'll get an assert from
-    // thread.cpp and will need to increase the buffer size
+    // if CRITICAL_SECTION size changes in Windows, you'll get an assert below
     //
     // finally, we need this typedef instead of declaring m_buffer directly
     // because otherwise the assert mentioned above wouldn't compile with some
@@ -254,6 +257,10 @@ private:
 #else // __WIN32__
     typedef char wxCritSectBuffer[24];
 #endif
+
+wxCOMPILE_TIME_ASSERT( sizeof(CRITICAL_SECTION) <= sizeof(wxCritSectBuffer),
+                       wxCriticalSectionBufferTooSmall );
+
     union
     {
         unsigned long m_dummy1;