add a warning if callfunc/@ is called with more than 5 parameters

[ZeeD]

I'm not sure about the cause of this limitation, but, apparently, it's not possible to call a function of a node with more that 5 parameters. If I do it, my channel stops, and, half of the times, my roku devices crashes and reset.

It would be useful to add some linters/compiler warnings about

• defining a function in a component (exposed in the <interface />) with more than 5 parameters
• calling [email protected](...) / node.callfunc("function", ...) with more than 5/6 parameters

[iObject]

@ZeeD Great suggestion. Working on this now.