patch 7.4.787

Problem:    snprintf() isn't available everywhere.
Solution:   Use vim_snprintf(). (Ken Takata)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    787,
 /**/
     786,
 /**/