unit test for bug1295

Change-Id: I90c6fea16c62863be024450bd31a88f9ba09abb3
Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
setting unspecified bonds when generating and InChI

Change-Id: If5653a0bd0b2e42272b9a496848a9fde0ace0b87
Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>