Corrects random_shape_slider integer bug #47

Corrected socket example: random_shape_slider #47   
Bug on line 12 when moving grid slider. 
Integer expected for step and max range.

With the help of @ms-studio

Sorry for the added return character.

And sorry for the other file added to this patch with changes the typography in a pathfilter draft example. It was just a suggestion to use libre fonts in your examples instead of proprietary ones.