fix linking error when wxUSE_ON_FATAL_EXCEPTION==0 (closes #10969)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@61341 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/stackwalk.cpp

@@ -318,6 +318,8 @@ void wxStackWalker::WalkFrom(const _EXCEPTION_POINTERS *ep, size_t skip)
 
 void wxStackWalker::WalkFromException()
 {
+    // wxGlobalSEInformation is unavailable if wxUSE_ON_FATAL_EXCEPTION==0
+#if wxUSE_ON_FATAL_EXCEPTION
     extern EXCEPTION_POINTERS *wxGlobalSEInformation;
 
     wxCHECK_RET( wxGlobalSEInformation,
@@ -325,6 +327,7 @@ void wxStackWalker::WalkFromException()
 
     // don't skip any frames, the first one is where we crashed
     WalkFrom(wxGlobalSEInformation, 0);
+#endif // wxUSE_ON_FATAL_EXCEPTION
 }
 
 void wxStackWalker::Walk(size_t skip, size_t WXUNUSED(maxDepth))