* src/Graph.h.in (PathElement::hasEdge): Check the correct
pointer, not the address of some member function.
* src/BuchiAutomaton.cc, src/Configuration.cc,
src/TestOperations.cc, src/TestOperations.h: Recode these files in
utf-8.
Kill some warnings on Ubuntu.
* src/UserCommandReader.cc (UserCommandInterface): Explicitly
ignore the return code of system() to kill a warning.
* src/TestOperations.cc (generateBuchiAutomaton): Explicitly
ignore the return code of write() to kill a warning.
and SIGQUIT.
* src/ExternalTranslator.cc (ExternalTranslator::translate): Likewise.
* src/main.cc (main): Do not intercept SIGINT in
non-interactive runs.