patch 7.4.1163

Problem:    Expressions "0 + v:true" and "'' . v:true" cause an error.
Solution:   Return something sensible when using a special variable as a
            number or as a string. (suggested by Damien)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1163,
 /**/
     1162,
 /**/