GAS for ARM: Reject ASR/LSR/ROR with immediate of 0

[Nick Clifton]

Hi Richard,

: So make it an as_warn, rather than an as_tsktsk.  Then the user can
: add -X to the assembly and will get an error.

Done.

: ! 	  if (num == 0)
: ! 	    {
: ! 	      as_tsktsk (_("Shift of 0 ignored."));
: ! >>>	      shift = shift_names;
: ! 	      assert (shift->properties->index == SHIFT_LSL);
: ! 	    }
: 
: On a point of style, I find assigning the "whole array" here confusing.  
: It would be much clearer if this read
: 
: 	shift = &shift_names[0];

I kind of liked it :-)  Oh well, anything for clarity and ease of
comprehension.

Done.

Cheers
	Nick