comment out LALINFERENCE_gslVector_t case

with the statement uncommented the build fails with:

ppe_init.c: In function 'PrintNonFixedSample':
ppe_init.c:1553:14: error: 'LALINFERENCE_gslVector_t' undeclared (first
    use in this function)

this is only the reference to the type LALINFERENCE_gslVector_t in the
entire code base.
Pipeline to pass fhigh to engine node