* src/evtgbaparse/Makefile.am, src/ltlparse/Makefile.am,
src/neverparse/Makefile.am, src/tgbaparse/Makefile.am
(AM_CPPFLAGS): Define -DYY_NO_INPUT so that the unused yyinput()
function does not get compiled.
* src/eltlparse/Makefile.am (AM_CPPFLAGS): Likewise.
(AM_CXXFLAGS): Also enable warnings.
* src/eltlparse/eltlparse.yy: Move helper functions from
the "%code requires" block to the "%code" block, so that they
do not appear in the eltlparse.hh file (which is included in
two places...).
* iface/nips/nips.cc (search_error_callback_assert): Comment
this unused function.
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