updated for version 7.4.537

Problem:    Value of v:hlsearch reflects an internal variable.
Solution:   Make the value reflect whether search highlighting is actually
            displayed. (Christian Brabandt)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    537,
 /**/
     536,
 /**/