patch 8.0.1160: getting tab-local variable fails after closing window

Problem:    Getting tab-local variable fails after closing window.
Solution:   set tp_firstwin and tp_lastwin. (Jason Franklin, closes #2170)
diff --git a/src/version.c b/src/version.c
index 5724b9d..f2f5c16 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1160,
+/**/
     1159,
 /**/
     1158,