Update protobuf-c to 0.14

Formula/protobuf-c.rb

@@ -1,14 +1,14 @@
 require 'formula'
 
 class ProtobufC <Formula
-  url 'http://protobuf-c.googlecode.com/files/protobuf-c-0.13.tar.gz'
+  url 'http://protobuf-c.googlecode.com/files/protobuf-c-0.14.tar.gz'
   homepage 'http://code.google.com/p/protobuf-c/'
-  sha1 '3144f260b736855cea2984731c2ba1647d40dfe0'
+  sha1 'b3af990906d8a8d86e2fb8cb6f39d0a37616ff8a'
 
   depends_on 'protobuf'
 
   def install
-    ENV.j1
+    ENV.j1 # Fixed in a post-0.14 change
     system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
     system "make install"
   end