Fixed undeclared identifier compile error.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24830 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/crashrpt.cpp

@@ -1089,7 +1089,13 @@ wxString wxCrashReportImpl::GetExceptionString(DWORD dwCode)
 
 #endif // wxUSE_DBGHELP
 
-bool wxCrashReportImpl::Generate(int WXUNUSED(flags))
+bool wxCrashReportImpl::Generate(
+#if wxUSE_DBGHELP
+    int flags
+#else
+    int WXUNUSED(flags)
+#endif
+)
 {
     if ( m_hFile == INVALID_HANDLE_VALUE )
         return false;