Check chromosome bounds

[adthrasher]

pipeline/utils.py

Lines 1041 to 1046 in 8108e90

	def makeSearchLocus(locus,upSearch,downSearch):
	if locus.sense() == '-':
	searchLocus = Locus(locus.chr(),locus.start()-downSearch,locus.end()+upSearch,locus.sense(),locus.ID())
	else:
	searchLocus = Locus(locus.chr(),locus.start()-upSearch,locus.end()+downSearch,locus.sense(),locus.ID())
	return searchLocus

This function should check the chromosome bounds when trying to extend the search locus. Otherwise you get downstream issues such as #83.