[gimp] plug-ins: avoid problematic/marginal JXL compression settings

[Daniel Novomeský <dnovomesky src gnome org>]

commit 1d1234b74482afedb3c31e6d24cfc8d02b1e4882
Author: Daniel Novomesky <dnovomesky gmail com>
Date:   Sat Nov 6 16:25:30 2021 +0100

    plug-ins: avoid problematic/marginal JXL compression settings

 plug-ins/common/file-jpegxl.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/plug-ins/common/file-jpegxl.c b/plug-ins/common/file-jpegxl.c
index cfc830b158..1920ce35e3 100644
--- a/plug-ins/common/file-jpegxl.c
+++ b/plug-ins/common/file-jpegxl.c
@@ -700,6 +700,16 @@ save_image (GFile                *file,
        * for better lossless compression efficiency. */
       uses_original_profile = TRUE;
     }
+  else
+    {
+      /* 0.1 is actually minimal value for lossy in libjxl 0.5
+       * 0.01 is allowed in libjxl 0.6 but
+       * using too low value with lossy compression is not wise */
+      if (compression < 0.1)
+        {
+          compression = 0.1;
+        }
+    }
 
   drawable_type   = gimp_drawable_type (drawable);
   drawable_width  = gimp_drawable_get_width (drawable);