[patch] Avoid warning for for %E format

[Rafael Espindola]

The patch in http://gcc.gnu.org/ml/gcc-cvs/2009-04/msg00931.html adds
support for the %E modifier, but we would still produce a warning for

 warning (0, G_("%H%qE is assigned to itself"), &location, lhs);

this patches fixes the warning.

2009-04-22  Rafael Avila de Espindola  <espindola@google.com>

	* c-format.c (gcc_tdiag_char_table): Add support for %E.

Cheers,
-- 
Rafael Avila de Espindola

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