Fix Number Pointer Input and add min/max support to Flonum

This is a fix for the changes introduced for #120

It fixes the pointer input on int and flonum objects and additionally adds support for min/max to flonum. This requires a rebuild of xebra.js

@starakaj @benbrackenc74 any of you wanna give it a whirl?

Here a very "elaborate" test patch:

----------begin_max5_patcher----------
686.3oc2VEzaaBCE9L7q.4yzLLP.xtsKSZRqcWlzNTUUYHlDmB1QFSTlpx+8
YrgjPaHjvXsa6hI9YG+deu2m+d9YSCPLaKt.X8Qq6sLLd1zvPYpxfQ8bCPNZ
aRFpPsMPZFiVlCr0KsAwonbrZEo4XL+d2GZVbMRjrjPW7HGmHz9vMLZhafWn
m6LnCbZf6TaK3rvIxOQtSbrsbkiVOTe.4DJIW5L4e8lYx8rObZrdvnz4DZFV
nBRXsQxbUfwhWcCbJ3vNYkhls5tOV4RbHv7GwTTbF93iIkwyQJ.DTaQe.het
FqgE.XaAhQzEf8wdAZCd9iHgfShKE3C+pnN4VmcqxgYkXVZi4F6GGSxb9hNy
ys1IgtgTPZCfVaHWl9Zk5ZsZwRFW7ROAOomZPu2IcBg1T0zqtyz7vG03NS6K
jxkvxywTQSATf2pJFfO+0u8ouesjsPmIJN2LEay4H1VuTnfSSgbFQH8k6tV.
Iu7TADn20imvwCOZlxYTE7tZUAW+JDEEbVUAnyqEE1aq2DPzv0D9aPAv62SA
.JIKWnDvfu+W4i+bB.+fHVZcKgZ8AqakXpaBlmihFEDUMBmF9p6JoLpHEkzp
D2K8wui6OGElqJKDjTRBRPXpLBbDg+crKB7ZEhPWM1CFGr68Fg8detA7bBKA
JUwtefQuvD9+1qFfCSyXHuK38qwe.TU1Gdq9Yu2c50HX381Cd6Zs2ecnyN48
gB++o6OOZWzFZ22oiRy2bBGMIs5rOSkdpRaUO566ndMmenmmuejiaTfskWEI
depOFk7zBNqjNuylNMcRHKnLoexHIO0kHc+bckiAn0q2f4E0ciTfUB0ULd0z
HaS8aK0SUtGvwUkK89UrN.hKgtPh6RttDsMPyRA4r4XNsjT2oSlfktTkFqJm
Eqq6vpx1l6L+E7Yv2tE
-----------end_max5_patcher-----------

Cycling74 / miraweb

Fix Number Pointer Input and add min/max support to Flonum #150