[PATCH:makedepend] Use do { ... } while(0) idiom to make debug() macro safer

[Adam Jackson]

On Sat, 2016-03-12 at 10:15 -0800, Alan Coopersmith wrote:
> Cleans up several -Wempty-body warnings from gcc 5.3
> 
> Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

Reviewed-by: Adam Jackson <ajax at redhat.com>

- ajax