patch 8.2.3193: screenpos() is wrong when 'display' is "lastline"

Problem:    screenpos() is wrong when the last line is partially visible and
            'display' is "lastline".
Solution:   Also compute the position for a partially visible line.
            (closes #8599)
diff --git a/src/version.c b/src/version.c
index cd20693..9533c88 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3193,
+/**/
     3192,
 /**/
     3191,