Fix bug in epsilon transitions when casting EpsNFA to ExtNFA

alib2data/src/automaton/FSM/ExtendedNFA.h

@@ -524,7 +524,7 @@ template < class EpsilonType >
 ExtendedNFA < SymbolType, StateType >::ExtendedNFA ( const EpsilonNFA < SymbolType, EpsilonType, StateType > & other ) : ExtendedNFA ( other.getStates ( ), other.getInputAlphabet ( ), other.getInitialState ( ), other.getFinalStates ( ) ) {
 	for ( const auto & transition : other.getTransitions ( ) ) {
 		if ( transition.first.second.template is < EpsilonType > ( ) ) {
-			ext::pair < StateType, regexp::UnboundedRegExpStructure < SymbolType > > key = ext::make_pair ( transition.first.first, regexp::UnboundedRegExpStructure < SymbolType > ( ) );
+			ext::pair < StateType, regexp::UnboundedRegExpStructure < SymbolType > > key = ext::make_pair ( transition.first.first, regexp::UnboundedRegExpStructure < SymbolType > ( regexp::UnboundedRegExpEpsilon < SymbolType > ( ) ) );
 			transitions[key] = transition.second;
 		} else {
 			ext::pair < StateType, regexp::UnboundedRegExpStructure < SymbolType > > key = ext::make_pair ( transition.first.first, regexp::UnboundedRegExpStructure < SymbolType > ( regexp::UnboundedRegExpSymbol < SymbolType > ( transition.first.second.template get < SymbolType > ( ) ) ) );