patch 7.4.1729

Problem:    The Perl interface cannot use 'print' operator for writing
            directly in standard IO.
Solution:   Add a minimal implementation of PerlIO Layer feature and try to
            use it for STDOUT/STDERR. (Damien)

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1729,
 /**/
     1728,
 /**/