tdf#76436 initialize maStartInterpolationValue.

Fix regrssion caused by 372c47309a192e67220913309fa1ccffdff8cde1,
where a from-to or from-by animation always interpolate with a
empty maStartInterpolationValue, ignoring original from value.

That also affect many animations, such as unexpected magnify effect
at the end of put-on-the-brake animation.

Change-Id: If63960816f2f284774c51e12be2fcac8c8a1b57e
Reviewed-on: https://gerrit.libreoffice.org/58109
Tested-by: Jenkins
Reviewed-by: Mark Hung <marklh9@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/slideshow/source/engine/activities/activitiesfactory.cxx b/slideshow/source/engine/activities/activitiesfactory.cxx
index dadd590257e0..1955be399fe1 100644
--- a/slideshow/source/engine/activities/activitiesfactory.cxx
+++ b/slideshow/source/engine/activities/activitiesfactory.cxx
@@ -208,6 +208,7 @@ public:
                 maStartValue = *maFrom;
                 maEndValue = maStartValue + *maBy;
             }
+            maStartInterpolationValue = maStartValue;
         }
         else
         {