patch 7.4.1333

Problem:    Channel test fails on non-darwin builds.
Solution:   Add the "osx" feature and test for that. (Kazunobu Kuriyama)

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1333,
 /**/
     1332,
 /**/