patch 8.1.2052: using "x" before a closed fold may delete that fold

Problem:    Using "x" before a closed fold may delete that fold.
Solution:   Do not translate 'x' do "dl". (Christian Brabandt, closes #4927)
diff --git a/src/version.c b/src/version.c
index af656f2..c0d161a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2052,
+/**/
     2051,
 /**/
     2050,