fiddle/extconf.rb: supply 0

* ext/fiddle/extconf.rb: supply 0 to fill RUBY_LIBFFI_MODVERSION
  with 3-digit.  libffi 3.1 returns just 2-digit.
  [ruby-core:62920] [Bug #9897]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46485 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat Jun 21 12:50:32 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/fiddle/extconf.rb: supply 0 to fill RUBY_LIBFFI_MODVERSION
+	  with 3-digit.  libffi 3.1 returns just 2-digit.
+	  [ruby-core:62920] [Bug #9897]
+
 Sat Jun 21 07:06:13 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* encoding.c (enc_find): [DOC] never accepted a symbol.

ext/fiddle/extconf.rb

@@ -7,7 +7,8 @@ dir_config 'libffi'
 pkg_config("libffi")
 if ver = pkg_config("libffi", "modversion")
   ver = ver.gsub(/-rc\d+/, '') # If ver contains rc version, just ignored.
-  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d%03d' % ver.split('.') }})
+  ver = (ver.split('.') + [0,0])[0,3]
+  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d%03d' % ver }})
 end
 
 unless have_header('ffi.h')