updated for version 7.3.852

Problem:    system() breaks clipboard text. (Yukihiro Nakadaira)
Solution:   Use Xutf8TextPropertyToTextList(). (Christian Brabandt)
            Also do not put the text in the clip buffer if conversion fails.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    852,
 /**/
     851,
 /**/