* process.c (run_exec_dup2): !save is false if Qnil.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20542 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Fri Dec  5 18:55:25 2008  Tanaka Akira  <akr@fsij.org>
+
+	* process.c (run_exec_dup2): !save is false if Qnil.
+
 Fri Dec  5 18:07:32 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* win32/win32.c (rb_w32_read, rb_w32_write, rb_w32_isatty): check

process.c

@@ -1910,7 +1910,7 @@ run_exec_dup2(VALUE ary, VALUE save)
     }
 
     /* sort the table by oldfd: O(n log n) */
-    if (!save)
+    if (!RTEST(save))
         qsort(pairs, n, sizeof(struct fd_pair), intcmp);
     else
         qsort(pairs, n, sizeof(struct fd_pair), intrcmp);