Fix Windows compile failure from unguarded daemon shutdown flag.

The script preload loop in wsgi_python_child_init referenced
wsgi_daemon_shutdown without a MOD_WSGI_WITH_DAEMONS guard. That
variable is only declared when daemon mode is available, which is
never the case on Windows, so compilation failed with C2065. Wrap
the reference in the conditional to match the other uses.

Author: GrahamDumpleton

docs/release-notes/version-6.0.1.rst

@@ -28,3 +28,10 @@ Bugs Fixed
   being updated to the buffer protocol. It now accepts any bytes-like
   object. For backward compatibility a ``str`` is still accepted, but
   doing so is now deprecated and will emit a ``DeprecationWarning``.
+
+* Compilation failed on Windows with ``error C2065: 'wsgi_daemon_shutdown':
+  undefined variable``. The script preload loop referenced the daemon
+  shutdown flag without guarding it with ``MOD_WSGI_WITH_DAEMONS``, but
+  that variable is only declared when daemon mode is available, which is
+  never the case on Windows. The reference is now protected by the
+  appropriate conditional.

src/server/wsgi_interp.c

@@ -3456,8 +3456,10 @@ apr_status_t wsgi_python_child_init(apr_pool_t *p)
              * we have already been flagged to be shutdown.
              */
 
+#if defined(MOD_WSGI_WITH_DAEMONS)
             if (wsgi_daemon_shutdown)
                 break;
+#endif
 
             if (!strcmp(wsgi_daemon_group, entry->process_group))
             {