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+Thu May  7 13:10:25 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (pipe_open): should be rb_pid_t.
+
 Wed May  6 16:50:20 2009  Tanaka Akira  <akr@fsij.org>
 
 	* math.c (math_gamma): use a table for positive small integers.