patch 9.0.0733: use of strftime() is not safe

Problem:    Use of strftime() is not safe.
Solution:   Check the return value of strftime().  Use a larger buffer and
            correctly pass the available space. (Dominique Pellé, closes
            #11348)

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    733,
 /**/
     732,
 /**/