Symbol will not be defined on Windows when daemon mode not available.

Author: GrahamDumpleton

docs/release-notes/version-4.5.22.rst

@@ -5,3 +5,9 @@ Version 4.5.22
 Version 4.5.22 of mod_wsgi can be obtained from:
 
   https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.22
+
+Bugs Fixed
+----------
+
+* Change in version 4.5.21 caused Windows builds to break with undefined
+  symbol ``wsgi_daemon_shutdown``.

src/server/wsgi_interp.c

@@ -1996,7 +1996,9 @@ apr_status_t wsgi_python_term(void)
 
     apr_thread_mutex_lock(wsgi_shutdown_lock);
 
+#if defined(MOD_WSGI_WITH_DAEMONS)
     wsgi_daemon_shutdown++;
+#endif
 
     Py_Finalize();