Fix possible uninitialized reference to pdu buffer.
Fix possible uninitialized reference to pdu buffer.

Coverity #300.

	modified:   src/pmlc/actions.c

ryandoyle/pcp_original,ryandoyle/pcp_original,edwardt/pcp,mbaldessari/pcp,adfernandes/pcp,ryandoyle/pcp_original,tjanez/pcp,prasincs/pcp,prasincs/pcp,andyvand/cygpcpfans,ryandoyle/pcp_original,mbaldessari/pcp,wuliming/pcp,tjanez/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,edwardt/pcp,adfernandes/pcp,prasincs/pcp,aeg-aeg/pcpfans,edwardt/pcp,ryandoyle/pcp_original,adfernandes/pcp,tjanez/pcp,adfernandes/pcp,prasincs/pcp,ryandoyle/pcp_original,ryandoyle/pcp_original,mbaldessari/pcp,prasincs/pcp,edwardt/pcp,tjanez/pcp,andyvand/cygpcpfans,wuliming/pcp,wuliming/pcp,tjanez/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,prasincs/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,ryandoyle/pcp_original,aeg-aeg/pcpfans,wuliming/pcp,andyvand/cygpcpfans,mbaldessari/pcp,adfernandes/pcp,tjanez/pcp,tjanez/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,edwardt/pcp,prasincs/pcp,prasincs/pcp,edwardt/pcp,andyvand/cygpcpfans,adfernandes/pcp,wuliming/pcp,wuliming/pcp,mbaldessari/pcp,aeg-aeg/pcpfans,edwardt/pcp,mbaldessari/pcp,wuliming/pcp,aeg-aeg/pcpfans,edwardt/pcp,adfernandes/pcp,wuliming/pcp,tjanez/pcp