Fixed multi instance problem on SHT3x #433

[JK-de]

Not tested!

It is a quick fix. Most other plugins have the same problem!!!

@psy0rz A general rework of the task structure have to be done:
Add an instance pointer to each task which is given to the plugin function like
boolean Plugin_068(byte function, struct EventStruct *event, String& string, void** inst). So you can set a class instance to any task separately

[beicnet]

@psy0rz Merge this pls! ;)

[uzi18]

@TD-er maybe global void ptr[Taskmax] is solution here?
With this we constantly spend precious memory.

[TD-er]

A pointer to what?
That's going to be a static_cast to what you hope is in there?
Also all plugins using this void pointer array should make sure to delete it. You cannot delete it when you don't know what object it is.
Or we should have a class ESPeasyVoid with a strict virtual destructor from which all things should inherit you want to put in there. Only then can you delete it when deleting from the web interface.

[uzi18]

Every task could map there own needed object, yes casting could be pain here.

[TD-er]

Please make an issue for it, then we can think about it.
Might not be a bad idea, but it may have some implications I want to think about first.

[uzi18]

Also as You see still moving into adding to plugins dynamic allocation/deallocation of memory and not static allocated, this could produce possibility of more plugins in memory but different problems comes along.

[beicnet]

@jkDesignDE Can you pls verify this too?