updated for version 7.3.818

Problem:    When test 40 fails because of a bad build it may leave files
            behind that cause it to fail later.
Solution:   Let the file names start with "X".

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    818,
 /**/
     817,
 /**/