Fixed an issue with incorrect left alignment of the placeholder text

There's an issue with incorrect left alignment of the placeholder in certain conditions.
You can see an example of the issue at: http://codepen.io/anon/pen/xdFib
In the example notice that the placeholder text is to the left of the input field overriding other elements.
![before](https://cloud.githubusercontent.com/assets/4381579/4873226/1b458fd4-6207-11e4-9519-309a6635ab19.png)

The fix was to add compensation for x difference like you have for the y difference.
You can see the result of applying the fix to the example at:
http://codepen.io/anon/pen/numxC
The placeholder text is now correctly placed in the the input field.
![after](https://cloud.githubusercontent.com/assets/4381579/4873230/43a4ca62-6207-11e4-8bf1-0273c1efcc3a.png)