[patch] Fix dwarf2read save gdb-index error checks.

[Tom Tromey]

>>>>> "Doug" == Doug Evans <dje@google.com> writes:

Doug> 2013-08-23  Doug Evans  <dje@google.com>
Doug> 	* dwarf2read.c (write_psymtabs_to_index): Move error checks ahead of
Doug> 	missing debug info checks.

Looks good to me.

Tom