Add missing return statement in an error condition.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 53eb237..6d50e8a 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4095,7 +4095,7 @@
 	if (sig == CTRL_C_EVENT || sig == CTRL_BREAK_EVENT) {
 		if (GenerateConsoleCtrlEvent(sig, pid) == 0) {
 			err = GetLastError();
-			PyErr_SetFromWindowsErr(err);
+			return PyErr_SetFromWindowsErr(err);
 		}
 		else
 			Py_RETURN_NONE;