switch to calloc for renderlist init
switch to calloc for renderlist init

RobertoMalatesta/glshim,RobertoMalatesta/glshim,lunixbochs/glshim,seandepagnier/glshim,seandepagnier/glshim,lunixbochs/glshim,RobertoMalatesta/glshim,seandepagnier/glshim,lunixbochs/glshim,RobertoMalatesta/glshim,seandepagnier/glshim,lunixbochs/glshim