cfengine silently ignores undefined filters

[Martin Jost]

Environment:
cfengine 1.6.3 (no patches)
HPUX 10.20
Compiled using the HP ANSI-C compiler
(/opt/ansic/bin/cc:
              LINT A.10.32.30 CXREF  A.10.32.30
        HP92453-01 A.10.32.30 HP C Compiler
         /usr/lib/libc: $Revision: 76.3 $
)


Example:

control:
   actionsequence =
      (
files
      )

   repository = ( /var/adm/cfengine/repository )
   sysadm = ( root )

   lasagne|lasagne_int::
      homes = ( "jost" )

filters:
   { dot_files_dirs
      Type: "reg|dir"
      NameRegex: "\..*"
      Result: "Type.NameRegex"
   }


files:
   /home/$(homes)               mode=g-w,o-rwx action=fixall recurse=1
filter=dot_files_dirs

Here I had (mistakenly)
/home/$(homes)          mode=g-w,o-rwx action=fixall recurse=1
filter=dot_files



Result:
cfengine ignores the missing filter as if no 'filter=' had been given
at all !
No warning is given !