parser: Do not scan processes twice

parser: Do not scan processes twice

Before we would scan some processes twice: First when we find out the
pages of the interesting processes, then again when we scan the rest
of the processes. This patch changes the handling so that the second
time we ignore all interesting pids that we already scanned.

Signed-off-by: Timo Kokkonen <kaapeli@itanic.dy.fi>