fix test code due to API changes in DeclarationContainer

test/SolidityExpressionCompiler.cpp

@@ -79,7 +79,9 @@ Declaration const& resolveDeclaration(
 	// bracers are required, cause msvc couldnt handle this macro in for statement
 	for (string const& namePart: _namespacedName)
 	{
-		BOOST_REQUIRE(declaration = _resolver.resolveName(namePart, declaration));
+		auto declarations = _resolver.resolveName(namePart, declaration);
+		BOOST_REQUIRE(!declarations.empty());
+		BOOST_REQUIRE(declaration = *declarations.begin());
 	}
 	BOOST_REQUIRE(declaration);
 	return *declaration;