patch 8.0.1033: detecting background color does not work in screen

Problem:    Detecting background color does not work in screen, even when it
            is working like an xterm.
Solution:   Make "screen.xterm" use termcap entries like an xterm. (Lubomir
            Rintel, closes #2048)  When termresponse version is huge also
            recognize as not being an xterm.
diff --git a/src/version.c b/src/version.c
index beb8ee7..807b2f1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1033,
+/**/
     1032,
 /**/
     1031,