[gnome-software: 4/10] gs-picture: Fix get_preferred_width() vfunc

[Philip Withnall <pwithnall src gnome org>]

commit 02f7b96e50c8e60c4968d12788892e34d6b58846
Author: Philip Withnall <pwithnall endlessos org>
Date:   Fri Aug 20 12:20:57 2021 +0100

    gs-picture: Fix get_preferred_width() vfunc
    
    When `get_preferred_width()` was called (not
    `get_preferred_width_for_*()`), `for_size` was set to `-1` by the
    caller, and then multiplied in to the sum, resulting in a negative
    natural width being returned.
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>

 src/gs-picture.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/gs-picture.c b/src/gs-picture.c
index 4fe2b0630..75ac34729 100644
--- a/src/gs-picture.c
+++ b/src/gs-picture.c
@@ -155,7 +155,10 @@ gs_picture_measure (GtkWidget              *widget,
                        gdouble width = gdk_pixbuf_get_width (picture->pixbuf);
                        gdouble height = gdk_pixbuf_get_height (picture->pixbuf);
 
-                       *natural = height <= 0 ? 0 : (width * for_size) / height;
+                       if (for_size < 0)
+                               *natural = width;
+                       else
+                               *natural = height <= 0 ? 0 : (width * for_size) / height;
                } else {
                        *natural = gdk_pixbuf_get_height (picture->pixbuf);
                }