Fix `make check` pep8 error introduced in 99e077f0
Fix `make check` pep8 error introduced in 99e077f0

On Fedora17's pep8 1.0.1 (though not on 1.4.2) it was causing:

    E251 no spaces around keyword / parameter equals

LewisHaley/stb-tester,martynjarvis/stb-tester,LewisHaley/stb-tester,martynjarvis/stb-tester,LewisHaley/stb-tester,wmanley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,martynjarvis/stb-tester,martynjarvis/stb-tester,martynjarvis/stb-tester,stb-tester/stb-tester,wmanley/stb-tester,LewisHaley/stb-tester,martynjarvis/stb-tester,LewisHaley/stb-tester,stb-tester/stb-tester,wmanley/stb-tester,stb-tester/stb-tester,martynjarvis/stb-tester,wmanley/stb-tester,stb-tester/stb-tester,wmanley/stb-tester