patch 8.0.1430: crash when term_start() fails

Problem:    Crash when term_start() fails.
Solution:   Initialize winpty_err.
diff --git a/src/version.c b/src/version.c
index a204e7c..7786474 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1430,
+/**/
     1429,
 /**/
     1428,