patch 8.1.1839: insufficient info when test fails because of screen size

Problem:    Insufficient info when test fails because of screen size.
Solution:   Report the detected screen size.
diff --git a/src/version.c b/src/version.c
index fbc1db9..aa44fb0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1839,
+/**/
     1838,
 /**/
     1837,