Re: readelf section reading

Re: readelf section reading

Fix commit 4de91c10cdd9, which cached the single section header read
to pick up file header extension fields.  Also, testing e_shoff in
get_section_headers opened a hole for fuzzers where we'd end up with
segfaults due to non-zero e_shnum but NULL section_headers.

	* readelf.c (get_section_headers): Don't test e_shoff here, leave
	that to get_32bit_section_headers or get_64bit_section_headers.
	(process_object): Throw away section header read to print file
	header extension.