Nope. Still says

E> The supplied TGA is not a true colour image.

tga_header Object
(
[id_length] => 0
[map_type] => 0
[image_type] => 0
[color_map_entry_index] => 0
[color_map_length] => 0
[color_map_entry_size] => 0
[image_origin_x] => 0
[image_origin_y] => 0
[image_width] => 0
[image_height] => 0
[image_depth] => 0
[image_flip_height] => 0
[image_flip_width] => 0
[image_alpha_channel] => 0000
)