svg_view: remove redundant NULL checking.
svg_view: remove redundant NULL checking.

wavewave/lasem,janmarthedal/mathml2svg,gjtorikian/lasem,wavewave/lasem,gjtorikian/lasem,wavewave/lasem,gjtorikian/lasem,janmarthedal/mathml2svg,gjtorikian/lasem,janmarthedal/mathml2svg,janmarthedal/mathml2svg,wavewave/lasem