Fix executing hooks with different prototypes

[M66B]

Note: performance penalty unknown

[rovo89]

Thanks! That should work. For performance reasons, I would compare the class before the prototype, but the should only be only a minimal difference.
I leave this open for now as I probably have to move around a couple of things for performance improvements, which could make the function in its current form unnecessary. But I will definitely keep this in mind during my changes.

[M66B]

I always test before I do a pull request, so yes it works ;-) I use it for my own project XPrivacy.

[rovo89]

Merged in 2704987.

As mentioned above I moved comparison of the prototype behind the comparison of the class name, as it can be a bit more complicated than a simple string comparison. Anyway, that shouldn't matter much.