patch 8.1.0244: no redraw when using a STOP signal on Vim and then CONT

Problem:    No redraw when using a STOP signal on Vim and then a CONT signal.
Solution:   Catch the CONT signal and force a redraw. (closes #3285)
diff --git a/src/version.c b/src/version.c
index 46125c0..0834540 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    244,
+/**/
     243,
 /**/
     242,