Fix memory leak when merging two csv records. free up the field struct when freeing up a record
Fix memory leak when merging two csv records.
free up the field struct when freeing up a record

Issue #6
https://github.com/CumulusNetworks/ptm/issues/6

benthomasson/ptm,CumulusNetworks/ptm,CumulusNetworks/ptm,CumulusNetworks/ptm,benthomasson/ptm,benthomasson/ptm