patch 7.4.1746

Problem:    Memory leak in Perl.
Solution:   Decrement the reference count.  Add a test. (Damien)

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1746,
 /**/
     1745,
 /**/