patch 8.2.1957: diff and cursorcolumn highlighting don't mix

Problem:    Diff and cursorcolumn highlighting don't mix.
Solution:   Fix condition for what attribute to use. (Christian Brabandt,
            closes #7258, closes #7260)
diff --git a/src/version.c b/src/version.c
index 4c8579a..ca5a513 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1957,
+/**/
     1956,
 /**/
     1955,