function prototype determination to cast arguments

[deresz]

Instead of simple arg frame size calculation (get_num_args_stack()) and argument primitive type guessing (only string and int) - we could read function prototypes guessed by IDA, or even HexRays decompiler plugin, and cast arguments at them. For API calls we could use some info from underlying debugging symbols. This seem cool but it's lot of work and it should be experimentally verified first if it would work at all.