updated for version 7.3.1243

Problem:    New regexp engine: back references in look-behind match don't
            work. (Lech Lorens)
Solution:   Copy the submatches before a recursive match.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1243,
 /**/
     1242,
 /**/