[C++ PATCH] Don't ICE in build_array_ref trying to SET_EXPR_LOCATION on error_mark_node (PR c++/37552)

[Mark Mitchell]

Jakub Jelinek wrote:

> 2008-09-17  Jakub Jelinek  <jakub@redhat.com>
> 
> 	* tree.c (protected_set_expr_location): Don't unnecessarily
> 	check for error_mark_node.

OK.

-- 
Mark Mitchell
CodeSourcery
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