transparency does not seem to work in plotRGB()

[rCarto]

Hi,
I couldn't get transparency to work in plotRGB(). See:

library(terra)
#> terra 1.7.83
b <- rast(system.file("ex/logo.tif", package="terra"))   
plotRGB(b, alpha = .5)

# the documentation says to set a value between 0 and 255 
plotRGB(b, alpha = 120)
#> Error in grDevices::rgb(t(grDevices::col2rgb(cols)), alpha = alpha, maxColorValue = 255): alpha level 30600, not in 0:255
packageVersion("terra")
#> [1] '1.7.83'
terra::gdal(lib="all")
#>     gdal     proj     geos 
#>  "3.6.2"  "9.1.1" "3.11.1"

I've also tried the a argument without success.

[rhijmans]

Thank you for reporting this. Both plotRGB(b, alpha = .5) and plot(b, alpha = .5) now work as expected.

[rCarto]

And thank you for the fix!