Memory Leak when Setting Timers

[siftd106]

mjs/fs/api_timer.js

Line 22 in dc74426

set: ffi('int mgos_set_timer(int,int,void(*)(userdata),userdata)'),

I am not sure exactly the extent of this memory leak, but it appears when setting, using and deleting timers (only from js?) the userdata is never released from memory, and thus if timers are used a lot, this will cause memory issues.

[siftd106]

It may only be an issue on the js side, and thus maybe the issue is somewhere in the ffi, Or possibly this is more of a core issue with the timers.