(UniXML): fixed SIGSEGV in iterator::findName

src/Various/UniXML.cc

@@ -598,6 +598,9 @@ bool UniXML_iterator::findName( const std::string& nodename, const std::string&
 	{
 		fnode = this->findX(fnode, nodename, deepfind);
 
+		if( !fnode )
+			return false;
+
 		if ( searchname == UniXML::getProp(fnode, "name") )
 		{
 			curNode = fnode;

tests/test_unixml.cc

@@ -97,6 +97,10 @@ TEST_CASE("UniXML::iterator", "[unixml][iterator][basic]" )
 	--it;
 	CHECK( it.getName() == "UserData" );
 
+	UniXML::iterator it_bad = uxml.begin();
+	REQUIRE_FALSE( it_bad.findName("UnknownNode","NOTFOUND") );
+	REQUIRE_FALSE( !it_bad );
+
 	it = uxml.begin();
 	CHECK( it.findName("TestNode", "TestNode1") != 0 );
 	it = uxml.begin();