patch 8.0.0051
Problem:    New code for job_stop() breaks channel test on AppVeyor.
Solution:   Revert the change.
diff --git a/src/structs.h b/src/structs.h
index bb0fc3a..7a4d7fb 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1437,6 +1437,7 @@
 #endif
 #ifdef WIN32
     PROCESS_INFORMATION	jv_proc_info;
+    HANDLE		jv_job_object;
 #endif
     jobstatus_T	jv_status;
     char_u	*jv_stoponexit; /* allocated */