patch 8.2.0204: crash when using winnr('j') in a popup window

Problem:    Crash when using winnr('j') in a popup window.
Solution:   Do not search for neighbors in a popup window. (closes #5568)
diff --git a/src/version.c b/src/version.c
index 43a03fe..c3dbec8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    204,
+/**/
     203,
 /**/
     202,