Include new header for 0.19.

ext/extconf.rb

@@ -21,8 +21,9 @@ dir_config 'rlibmemcached'
 unless find_library 'memcached', 'memcached_server_add', *ENV['LD_LIBRARY_PATH'].to_s.split(":")
   raise "shared library 'libmemcached' not found"
 end
-unless find_header 'libmemcached/memcached.h', *ENV['INCLUDE_PATH'].to_s.split(":")
-  raise "header file 'libmemcached/memcached.h' not  found"
+
+['libmemcached/memcached.h', 'libmemcached/memcached_constants.h'].each do |include|
+  raise "header file '#{include}' not  found" unless find_header include, *ENV['INCLUDE_PATH'].to_s.split(":")
 end
 
 create_makefile 'rlibmemcached'

ext/rlibmemcached.i

@@ -1,6 +1,7 @@
 %module rlibmemcached
 %{
 #include <libmemcached/memcached.h>
+#include <libmemcached/memcached_constants.h>
 %}
 
 %warnfilter(SWIGWARN_RUBY_WRONG_NAME) memcached_st;
@@ -89,6 +90,7 @@
 };
 
 %include "/opt/local/include/libmemcached/memcached.h"
+%include "/opt/local/include/libmemcached/memcached_constants.h"
 
 //// Custom C functions