EvTransitionEffect: support duration in decimal value
duration of EvTransitionEffect was of
int type, so when passing a
0.5 value it would
cast to zero.
So let's add a new
duration-real property to hold
the duration in decimal format, and use it for the
PS. Included is also a commit about fixing a g_critical message when trying to double remove a timer. I found that while working on this issue.