[PATCH][AArch64][GAS] Fix unintialized variable which can cause diagnostic failures.

[Nick Clifton]

Hi Tamar,

> gas/config/tc-aarch64.c
> 2018-05-21  Tamar Christina  <tamar.christina@arm.com>
> 
> 	PR binutils/21446
> 	* tc-aarch64.c (record_operand_error, record_operand_error_with_data):
> 	  Initialize non_fatal.

Approved - please apply.

Cheers
  Nick