{AH} only return full range if neither tid/reference/region are given
@@ -704,7 +704,7 @@ cdef class AlignmentFile(HTSFile):
cdef long long rstart
cdef long long rend
- if reference is None and tid is None:
+ if reference is None and tid is None and region is None:
return 0, 0, 0, 0
rtid = -1
