removed -Wconversion warnings in bbob2009_logger.c
removed -Wconversion warnings in bbob2009_logger.c

oaelhara/numbbo,NDManh/numbbo,dtusar/coco,dtusar/coco,NDManh/numbbo,NDManh/numbbo,dtusar/coco,oaelhara/numbbo,NDManh/numbbo,dtusar/coco,oaelhara/numbbo,oaelhara/numbbo,dtusar/coco,NDManh/numbbo,NDManh/numbbo,oaelhara/numbbo,dtusar/coco,oaelhara/numbbo,oaelhara/numbbo,NDManh/numbbo,oaelhara/numbbo,dtusar/coco,NDManh/numbbo,dtusar/coco,oaelhara/numbbo,NDManh/numbbo,dtusar/coco