updated for version 7.3.491

Problem:    No tests for Lua.
Solution:   Add some simple tests for Lua. (Luis Carvalho)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    491,
 /**/
     490,
 /**/