src: fix signal handler crash on close

PR-URL: #30582
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>

src/signal_wrap.cc

@@ -91,7 +91,10 @@ class SignalWrap : public HandleWrap {
   }
 
   void Close(v8::Local<v8::Value> close_callback) override {
-    if (active_) DecreaseSignalHandlerCount(handle_.signum);
+    if (active_) {
+      DecreaseSignalHandlerCount(handle_.signum);
+      active_ = false;
+    }
     HandleWrap::Close(close_callback);
   }