updated for version 7.3.156

Problem:    Tty names possibly left unterminated.
Solution:   Use vim_strncpy() instead of strncpy().

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    156,
 /**/
     155,
 /**/