patch 9.1.0887: Wrong expression in sign.c

Problem:  Wrong expression in sign.c
          (after v9.1.0885)
Solution: remove the duplicate expression

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/sign.c

@@ -2819,7 +2819,7 @@ sign_unplace_from_dict(typval_T *group_tv, dict_T *dict)
 
     if (dict != NULL)
     {
-        dictitem_T *di = di = dict_find(dict, (char_u *)"buffer", -1);
+        dictitem_T *di = dict_find(dict, (char_u *)"buffer", -1);
         if (di != NULL)
         {
             buf = get_buf_arg(&di->di_tv);

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    887,
 /**/
     886,
 /**/