Inline temp vars regression in rc.5

```haxe
class Test {
static var foo = new Sets();
static function main() {
var foo2 = new Sets(Std.random(3) * 2);
init(foo2);
trace(foo);
}
static inline function init(foo2:Sets) {
foo.start = foo2.start;
}
}

class Sets {
public var start = 0;
public inline function new(start = 0):Void {
this.start = start;
}
}
```
http://try-haxe.mrcdk.com/#bf1A2
Diff (with analyzer-optimize):
```diff
var start = Std.random(3) * 2;
< Test.foo.start = start;
---
> if(start == null) {
> start = 0;
> }
> var foo2_start = 0;
> foo2_start = start;
> Test.foo.start = foo2_start;
console.log("root/program/Test.hx:6:",Test.foo);
```

The issue provides a complete Haxe reproduction and generated diff; start by running the Try Haxe link with analyzer-optimize enabled and comparing rc.5 behavior. Trace the compiler's inline-temporary handling from that reproduction, then confirm the generated output no longer shows the reported regression.

Written by the indexing model from the issue text.