[LyX/master] Fix embarrassing logic mistake

[Guillaume Munch]

commit 096afc733b85a15c0f7a55f9af12796d4e55e54a
Author: Guillaume Munch <g...@lyx.org>
Date:   Wed Aug 3 22:11:00 2016 +0100

    Fix embarrassing logic mistake
    
    Thanks Richard for pointing at it.
---
 src/insets/ExternalTransforms.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/insets/ExternalTransforms.cpp 
b/src/insets/ExternalTransforms.cpp
index 7ac41ab..e7c8cf6 100644
--- a/src/insets/ExternalTransforms.cpp
+++ b/src/insets/ExternalTransforms.cpp
@@ -338,7 +338,7 @@ void extractIt(boost::any const & any_factory,
                return;
 
        Factory factory = boost::any_cast<Factory>(any_factory);
-       if (!factory)
+       if (factory)
                transformer = factory(data);
 }