Fix fopen (non-existing-file, "re") errno

[Andreas Jaeger]

errno was set to EBADF with a call to fopen (non-existing-file, "re") instead 
of ENOENT. The problem was a missing check. Fixed with the appended patch,

Andreas

2011-08-19  Andreas Jaeger  <aj@suse.de>

	[BZ #13114]
	* libio/fileops.c (_IO_new_file_fopen): Fix handling of
	non-existant file when using closeexec mode.

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