Raster Calculator Doesn't Work if Want to Return Multiple Bands

[DanielJDufour]

Describe the bug

To Reproduce

1. Go to http://app.geotiff.io/raster-calculator?url=https://s3.amazonaws.com/geoblaze/wildfires.tiff
2. Run following raster calculation:

// A is RED
// B is GREEEN
// C is BLUE
if (A > 200) {
 return [A, 0, 0];
} else if (C > 150) {
 return [0, 0, C];
} else {
 return [0, 0, 0];
}

Expected behavior

Returns image with everything except wildfires and lakes blacked out

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context