Fix T43989: Sequencer - Ctrl snapping a sequencer strip does not work if you specify the x axis.

New 'strip' snapping was simply not computed in case of constrained transform, hence init
'0' value was used as frame offset in this case.

This commit reorganizes a bit that snapping, to keep it more 'confined' into `snapSequenceBounds()`
dedicated function. It still needs a minor hack (setting snapping mode to something else than
defualt `SCE_SNAP_MODE_INCREMENT`, to avoid this snapping to be called by contraint code).

Thanks to Antony for review and enhancements.

This fix should be backported to 2.74.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/transform/transform.h b/source/blender/editors/transform/transform.h
index 8d6c693b14a..97cc6dd9dd1 100644
--- a/source/blender/editors/transform/transform.h
+++ b/source/blender/editors/transform/transform.h
@@ -626,7 +626,7 @@ typedef enum {
 void snapGridIncrement(TransInfo *t, float *val);
 void snapGridIncrementAction(TransInfo *t, float *val, GearsType action);
 
-int snapSequenceBounds(TransInfo *t, const int mval[2]);
+void snapSequenceBounds(TransInfo *t, const int mval[2]);
 
 bool activeSnap(TransInfo *t);
 bool validSnap(TransInfo *t);