patch 9.0.1595: line pointer becomes invalid when using spell checking

Problem:    Line pointer becomes invalid when using spell checking.
Solution:   Call ml_get() at the right places. (Luuk van Baal, closes #12456)
diff --git a/src/version.c b/src/version.c
index e4dc511..4b04193 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1595,
+/**/
     1594,
 /**/
     1593,