Revert trap behavior for the sake of autoconf-generated configure scripts.  
The problem here is that bash -c 'trap 0' works, but sh -c 'trap 0' doesn't 
work because the bash developers are trying to adhere to POSIX in that case.  
Since all the configure scripts are #!/bin/sh, this breaks them... That's bad
news and will need some time to fix, so it's easier to fix here for the 
moment.

http://bugs.gentoo.org/58703

--- bash-3.0/builtins/trap.def.noposix	2004-07-28 22:38:38.000000000 -0400
+++ bash-3.0/builtins/trap.def	2004-07-28 22:39:01.948314454 -0400
@@ -122,12 +122,18 @@
 
       operation = SET;
       first_arg = list->word->word;
+#if 0
       /* When in posix mode, the historical behavior of looking for a
 	 missing first argument is disabled.  To revert to the original
 	 signal handling disposition, use `-' as the first argument. */
       if (posixly_correct == 0 && first_arg && *first_arg &&
 		(*first_arg != '-' || first_arg[1]) &&
 		signal_object_p (first_arg, opt) && list->next == 0)
+#else
+       if (first_arg && *first_arg &&
+ 		(*first_arg != '-' || first_arg[1]) &&
+ 		signal_object_p (first_arg, opt) && list->next == 0)
+#endif
 	operation = REVERT;
       else
 	{