linux pmda: plug memory leak in /proc/interrupts parsing
linux pmda: plug memory leak in /proc/interrupts parsing

Previous code in src/pmdas/linux/interrupts.c accidentally forgot that
it had already parsed the structure of /proc/interrupts into the
interrupt_lines/interrupt_other realloc variables by resetting the
lines_count/other_count variables every refresh.  That caused an
endless re-allocation growth.  Hey, teacher, leave those _counts alone!

Reported-By: Mahmoud Hanafi <ad7f88a57b303bd389b89cbcd6b33cac33925d6a@nasa.gov>

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