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.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    819,
 /**/
     818,
 /**/