Fix parsing not always converting expressions

[TPGamesNL]

Description

The parser returned a expression that was parsed, even if the return type didn't match, under the following conditions:

1. The syntax it was used in supported multiple types for that expression
2. The return type of the parsed expression was Object

The comment on the line responsible for this behaviour was:

Expression will have to deal with it runtime

But this is a bad idea, as a syntax element could receive an expression it wasn't made for.

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Target Minecraft Versions: any
Requirements: none
Related Issues: #3695, #3782

[APickledWalrus]

This looks fine to me (as long as anything won't be broken). I used this test (similar to the one in the linked issue):

on right click:
	set {_x} to chest inventory named "GUI"
	set slot 0 of {_x} to stone named "Item Test"
	open {_x} to player
	wait 5 tick
	set {_it::*} to all items out of current inventory
	loop {_it::*}:
		send "%name of loop-value%"
		send "%item amount of loop-value%"