[RFA] Fix size check in dwarf2_evaluate_loc_desc_full

[Simon Marchi]

On 2017-05-30 01:19, Tom Tromey wrote:
> Simon> Would it be possible to test the error case as well by feeding 
> bad
> Simon> DWARF info in the test case?
> 
> Sure, here it is.
> 
> Tom

Awesome!