
Deals with missing chromosome arm values in the given data frame of small segments.
SmallMissingChrArms.RdPretty much as in LargeMissingChrArms, except it removes the small segments that are not in the missing_chr_arm.

SmallMissingChrArms.RdPretty much as in LargeMissingChrArms, except it removes the small segments that are not in the missing_chr_arm.