Vehicles from other dimensions may appear in the current one

[tederis]

Describe the bug
In some situations vehicles from other dimensions may appear in the current one. The series of calls setElementDimension along with some specific conditions is resulting in breaking of streaming out process. The more complex(like more vertices or bigger size of .txds) a model the more likely the bug appears. But it's only when models don't exist in the model cache.

To reproduce
Steps to reproduce the behaviour:

1. Restart the game to clean up the model cache.
2. Download and run the resource testcase_stream
3. Type the command begintest
4. You will warp to the airport
5. You can probably see the bug

testcase_stream.zip

Expected behaviour
Vehicles from other dimension should not appear in the current one(except -1 dimension)

Screenshots

Version
Multi Theft Auto v1.5.7-release-20399