patch 8.1.0373: screen updating still slow when 'cursorline' is set

Problem:    Screen updating still slow when 'cursorline' is set.
Solution:   Fix setting last_cursorline.
diff --git a/src/version.c b/src/version.c
index 53dbfd9..a4df820 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    373,
+/**/
     372,
 /**/
     371,