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+Sun Aug 30 13:00:11 2009  Tanaka Akira  <akr@fsij.org>
+
+	* time.c (add): shortcut implemented for fixnums.
+	  (sub): ditto.
+	  (mul): ditto.
+
 Sun Aug 30 10:24:43 2009  Tanaka Akira  <akr@fsij.org>
 
 	* time.c (eq): apply RTEST.