* src/tgba/tgbagraph.cc (merge_transitions): Disable acceptance
merging if Fin acceptance is used.
* src/tgbaalgos/degen.cc, src/tgbaalgos/dtbasat.cc,
src/tgbaalgos/dtgbasat.cc, src/tgbaalgos/isweakscc.cc,
src/tgbaalgos/lbtt.cc, src/tgbaalgos/minimize.cc,
src/tgbaalgos/neverclaim.cc, src/tgbaalgos/safety.cc,
src/tgbaalgos/sccfilter.cc, src/tgbaalgos/simulation.cc: Throw an
exception if an unsupported type of acceptance is received.