patch 7.4.705
Problem:    Can't build with Ruby 2.2.
Solution:   Add #ifdefs to handle the incompatible change. (Andrei Olsen)
diff --git a/src/version.c b/src/version.c
index 11dd808..0b2d6fe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    705,
+/**/
     704,
 /**/
     703,