add newline to the end of struct.c to make some whiney compilers happy

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@915398 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/rb/ext/struct.c b/lib/rb/ext/struct.c
index d459ddb..79b1e01 100644
--- a/lib/rb/ext/struct.c
+++ b/lib/rb/ext/struct.c
@@ -703,4 +703,4 @@
 
   set_default_proto_function_pointers();
   mt = default_mt;
-}
\ No newline at end of file
+}