patch 8.0.0819: cursor not positioned in terminal window

Problem:    After changing current window the cursor position in the terminal
            window is not updated.
Solution:   Set w_wrow, w_wcol and w_valid.
diff --git a/src/version.c b/src/version.c
index 5b831d4..2d4c50e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    819,
+/**/
     818,
 /**/
     817,