wrap the #ifdef GRAPH_GENERATOR_OMP and fix the 30th issue
wrap the #ifdef GRAPH_GENERATOR_OMP and fix the 30th issue

uwsampa/graphbench,alabarga/graphbench,uwsampa/graphbench,uwsampa/graphbench,alabarga/graphbench,alabarga/graphbench,uwsampa/graphbench,uwsampa/graphbench,alabarga/graphbench,alabarga/graphbench