[lib] Need to use FREE macro instead of free.
[lib] Need to use FREE macro instead of free.

When using the internal memory leak checker it is imperative that
all free use the FREE macro. Otherwise accounting errors show up.

vijaychauhan/multipath-tools,vijaychauhan/multipath-tools,grzn/multipath-tools-explained,unakatsuo/multipath-tools,gebi/multipath-tools,unakatsuo/multipath-tools,unakatsuo/multipath-tools,grzn/multipath-tools-explained