Inkscape Crashes when W or H value of image with locked proportions is set to blank (or 0.00)
Hello,
I imported a PNG image into a new Inkscape document.
After selecting the image, while trying to resize it, I backspaced the entire 'W' value so that it was blank and accidentally clicked outside the 'W' box.
Inkscape crashed instantly.
I then repeated by deleting the 'H' value and clicking outside the 'H' box.
Inkscape crashed again.
I tried a few more times to confirm, and Inkscape crashed every time.
It does not repeat the issue with vector shapes (circles etc).
So, the issue seems to be related to resizing of **images only**, when either 'W' or 'H' is blank, and the user clicks elsewhere outside that box.
**Triage notes**: seems to only happen when the "lock proportions" toggle is active.
```
Inkscape 1.4 (86a8ad7, 2024-10-11)
Compile (Run)
GLib version: 2.82.1
GTK version: 3.24.43 (3.24.43)
glibmm version: 2.66.7
gtkmm version: 3.24.9
libxml2 version: 2.12.9
libxslt version: 1.1.42
Cairo version: 1.18.2 (1.18.2)
Pango version: 1.54.0 (1.54.0)
HarfBuzz version: 10.0.1 (10.0.1)
OS version: Windows 11 23H2
when
```
issue