Commit: Fix seg-fault disassembling EFI files

[Nick Clifton]

Hi Guys,

  I am checking in the attached patch to fix an access through a NULL
  pointer triggered by attempting to disassemble an EFI file with source
  included.  This was reported on the Fedora bugzilla system here:
  
https://bugzilla.redhat.com/show_bug.cgi?id=1685727

Cheers
  Nick

bfd/ChangeLog
2019-03-06  Nick Clifton  <nickc@redhat.com>

	* dwarf2.c (_bfd_dwarf2_find_symbol_bias): Check for a NULL symbol
	table pointer.
	* coffgen.c (coff_find_nearest_line_with_names): Do not call
	_bfd_dwarf2_find_symbol_bias if there is no symbol table available.

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