[fixed] Can't import TGA image format.

[tkbd]

Attempting to import images in TGA format results in an error.
(TGA is one of the image format often used in 3DCG textures.)

Wings3D display a following message dialog (No crash log and no error log).

Quote:"Failed to load "(The tga image file's Path)": unknown POSIX error"

I tried it with and without alpha channel, but the same error occurred in both cases.

I checked at importing of other image formats on Mac.

Quote: tga NG
--------
bmp OK
jpg OK
gif OK
tif OK
png OK

How about other OS,can import these image formats?

Wings3D 2.1.4.1
OSX 10.11.6