AIX - swap queue --> graph error due to missing values

[Pitterling]

see also #201

00:00:00 runq-sz %runocc swpq-sz %swpocc
00:01:00     8.7      97                
00:02:00     6.7      95                
00:03:00     7.1      97                
00:04:00     6.5      97                
00:05:00     7.3      95                
00:06:00     7.3      97                
00:07:00     7.1      97     1.0       3
00:08:00     7.5      97                
00:09:00     6.5      97                
00:10:00     6.2      95     1.0       2
00:11:00     7.5      98                
00:12:00     9.7      93     1.0       2
00:13:00     8.9      97                
00:14:00     7.5      97     1.0       3
00:15:00     6.6      98                
00:16:00     7.0      95     1.0       3

13:38:39.662 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:02:00     6.7      95

13:38:39.663 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:03:00     7.1      97

13:38:39.664 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:04:00     6.5      97

13:38:39.664 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:05:00     7.3      95

13:38:39.664 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:06:00     7.3      97

13:38:39.665 [Thread-3] ERROR net.atomique.ksar.graph.Graph - Runq col 3 is missing 00:08:00     7.5      97