patch 9.0.1527: crash when using negative value for term_cols

Problem:    Crash when using negative value for term_cols.
Solution:   Check for invalid term_cols value. (Kenta Sato, closes #12362)
diff --git a/src/version.c b/src/version.c
index ce64da4..e6d2713 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1527,
+/**/
     1526,
 /**/
     1525,