modulo-sched.c (get_sched_window): Use just one loop for predecessors and one loop...

modulo-sched.c (get_sched_window): Use just one loop for predecessors and one loop for successors.

gcc/
	* modulo-sched.c (get_sched_window): Use just one loop for predecessors
	and one loop for successors.  Fix upper bound of memory range.

From-SVN: r177555