FUNCTION: LieTools/fwgtIP
USAGE: fwgtIP(fw1,fw2);
SYNOPSIS: This routine computes the inner product of two weight
  vectors specified in terms of there components w.r.t.
  a basis of fundamental weights
CAVEATS: requires a previously initialized global Lie algebra environment.
  (See LieTools[gSetup].)
EXAMPLE: 
> LieTools[fwgtIP]([1,0],[0,1],G2);
                                  3

SEE ALSO: 
