Small tweaks.

pbstream.c

@@ -13,8 +13,8 @@
 #define likely(x)       __builtin_expect((x),1)
 #define unlikely(x)     __builtin_expect((x),0)
 #else
-#define likely(x)
+#define likely(x)       (x)
-#define unlikely(x)
+#define unlikely(x)     (x)
 #endif
 
 /* An array, indexed by pbstream_type, that indicates what wire type is

pbstream.h

@@ -1,5 +1,5 @@
 /*
- * pbstream - a small and simple implementation of Protocol Buffers.
+ * pbstream - a stream-oriented implementation of protocol buffers.
  *
  * Copyright (c) 2008 Joshua Haberman.  See LICENSE for details.
  */