Warning fix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31428 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/crashrpt.cpp

@@ -222,6 +222,7 @@ bool wxCrashReportImpl::Generate(int flags, EXCEPTION_POINTERS *ep)
     }
 #else // !wxUSE_DBGHELP
     wxUnusedVar(flags);
+    wxUnusedVar(ep);
 
     Output(_T("Support for crash report generation was not included ")
            _T("in this wxWidgets version."));