src: fix kill signal 0 on Windows

This special case was missed in the previous changes to this file.

Refs: #55514
Refs: #42923
Fixes: #57669

Author: StefanStojanovic

src/process_wrap.cc

@@ -385,7 +385,7 @@ class ProcessWrap : public HandleWrap {
     }
 #ifdef _WIN32
     if (signal != SIGKILL && signal != SIGTERM && signal != SIGINT &&
-        signal != SIGQUIT) {
+        signal != SIGQUIT && signal != 0) {
       signal = SIGKILL;
     }
 #endif

test/parallel/test-child-process-kill.js

@@ -60,3 +60,12 @@ if (common.isWindows) {
   });
   process.kill('SIGHUP');
 }
+
+// Test that the process is not killed when sending a 0 signal.
+// This is a no-op signal that is used to check if the process is alive.
+const checkProcess = spawn(process.execPath, ['-e', 'setTimeout(() => {}, 1000)']);
+checkProcess.on('exit', (code, signal) => {
+  assert.strictEqual(code, 0);
+  assert.strictEqual(signal, null);
+});
+checkProcess.kill(0);