QShaderGenerator: Don't crash when a node has multiple outputs

It was already possible to declare a node prototype with multiple
outputs, but trying to assign to all those outputs was not possible and
instead resulted in a crash.

It is now possible to declare nodes like this without crashing:
"SEPERATE_XYZ": {
  "inputs": ["vector"],
  "outputs": ["x", "y", "z"],
  "rules": [
    {
        "substitution": "float $x = $vector.x;
                         float $y = $vector.y;
                         float $z = $vector.z;"
    }
  ]
}

Change-Id: I748e77e84c9120dc688c573eee33dc13c6bfbace
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

0 files changed, 0 insertions, 0 deletions