Pull request to master

hi! @ericacaber meant that the `if` body of this `if-else` statement is empty, and only the `else` statement is used.
If the `else` statement is only being used, we can just negate the expression:
```
if (_currentPoint.x != I4IR_DWIDTH) {
   _currentPoint.x +=I4IR_WIDTH;
   [self animateScreenWithDirection:ANIMATE_RIGHT];
}
```
:bow: