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

src/msw/listctrl.cpp

@@ -113,16 +113,16 @@ public:
         m_pItem = &item;
     }
 
+    // memcpy() in Init() can't work if the struct sizes are different
+    wxCOMPILE_TIME_ASSERT( sizeof(LV_ITEM_OTHER) == sizeof(LV_ITEM_NATIVE),
+                           CodeCantWorkIfDiffSizes);
+
     // init with conversion
     void Init(LV_ITEM_OTHER& item)
     {
         // avoid unnecessary dynamic memory allocation, jjust make m_pItem
         // point to our own m_item
 
-        // memcpy() can't work if the struct sizes are different
-        wxCOMPILE_TIME_ASSERT( sizeof(LV_ITEM_OTHER) == sizeof(LV_ITEM_NATIVE),
-                                CodeCantWorkIfDiffSizes);
-
         memcpy(&m_item, &item, sizeof(LV_ITEM_NATIVE));
 
         // convert text from ANSI to Unicod if necessary