mingw: fix compile error

src/suricata.c

@@ -2470,8 +2470,10 @@ static void PostRunStartedDetectSetup(const SCInstance *suri)
         /* force 'reload', this will load the rules and swap engines */
         DetectEngineReload(suri);
         SCLogNotice("Signature(s) loaded, Detect thread(s) activated.");
+#ifndef OS_WIN32
         UtilSignalHandlerSetup(SIGUSR2, SignalHandlerSigusr2);
         UtilSignalUnblock(SIGUSR2);
+#endif
     }
 }