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.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1033,
 /**/
     1032,
 /**/