Add short[] support for printArray()

There are 8 primitive types in Java. Method **printArray()** supports all but `short`!  :rage1:
Although `short` isn't a Processing's "official" type, but neither are `long` nor `double`!  :see_no_evil:
In order to correct this grave prejudiced injustice, I'm begging you devs to accept this pull request!  :angel: