SpahQL breaks in #select method when the Array.prototype is extended

[gwang]

When using SpahQL with a script that extends Array.prototype by code like:

Array.prototype.myfunc = function (...) { ...}

SpahQL breaks in multiple places start with select stop working.

It looks like SpahQL use for ... in quite a lot which could be the cause of this problem, which will include the extended properties.

[pplanel]

same problem here, using prototypejs.