patch 8.1.1235: compiler warnings for using STRLEN() value

Problem:    Compiler warnings for using STRLEN() value.
Solution:   Cast to int. (Christian Brabandt, Mike Williams)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1235,
 /**/
     1234,
 /**/