`SQVM::PopGet()` leaves lingering object references

[samisalreadytaken]

SQVM::PopGet() does not clear stack position, leaving lingering objects in the stack until either that position is overwritten or the VM is killed. This can cause unexpected behaviour in code that relies on it.

It should probably behave like Top(); Pop(); as its name suggests, nullifying the stack position.

squirrel/squirrel/sqvm.cpp

Line 1765 in c02bf2d

SQObjectPtr &SQVM::PopGet() { return _stack[--_top]; }