Fix the build on 64 bit platforms.
Fix the build on 64 bit platforms.

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