updated for version 7.3.1159

Problem:    The round() function is not always available. (Christ van
            Willegen)
Solution:   Use the solution from f_round().

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1159,
 /**/
     1158,
 /**/