img_assist_render_image always chooses the smallest size

Sorry if this is a duplicate. I see several issues that are similar, but not precisely what I am experiencing.

I configured the image module with 6 image sizes that just specify the width, not the height:

Original: - x -
Thumbnail: 100 x -
Preview: 480 x -
Half-Width: 240 x -
Third-Width: 160 x -
Gallery: 100 x -

I have also turned off all the "Image derivatives" options.

When only one dimension is specified, img_assist macros (which call img_assist_render_image) effectively ignore all possible sizes and always choose the smallest one, in this case, "Thumbnail."

Here is a patch against 5.x-1.8, which fixes the problem by passing the image's aspect ratio to images_get_size to force it to return both width and height. I haven't looked at all the other branches, but I think the same problem and same patch work everywhere else.

diff -u -r1.68.2.54 img_assist.module
--- img_assist.module   15 Jul 2009 22:58:26 -0000      1.68.2.54
+++ img_assist.module   21 Jul 2009 16:18:00 -0000
@@ -1298,7 +1298,7 @@
           $diag_size_new = sqrt(pow($width, 2) + pow($height, 2));
           $closest_difference = 9999;

-          foreach (image_get_sizes() as $key => $stdsize) {
+          foreach (image_get_sizes(NULL, $aspect_ratio) as $key => $stdsize) {
             $width_std = $stdsize['width'];
             $height_std = $stdsize['height'];
             // Get default width and height, taking the aspect ratio into account.