minor improvement to error reporting in target lookup
minor improvement to error reporting in target lookup

trailofbits/mcsema,trailofbits/mcsema,chubbymaggie/mcsema,alessandrogario/mcsema,jcranmer/mcsema,chubbymaggie/mcsema,jcranmer/mcsema,alessandrogario/mcsema,alessandrogario/mcsema,jcranmer/mcsema,trailofbits/mcsema,trailofbits/mcsema,chubbymaggie/mcsema,alessandrogario/mcsema,jcranmer/mcsema,chubbymaggie/mcsema