Code review comment for lp://qastaging/~mc-return/compiz/compiz.merge-plugin-simple-animations

I also ran cppcheck on this plug-in and found a few issues I've now fixed also.

1. Reduced the scope of the float distance

2. Removed redundant condition check of the angle (if the angle is more than 270 it will always be bigger than 90), but please check that again, because it might be a typo and it could also mean that the angle should be between 90 and 270.
The rotatein animation works perfectly though...

3. Not fixed yet: (warning) Member variable 'ExtensionPluginAnimSim::mOutput' is not initialized in the constructor.
Should this be fixed ?