Image is truncated for some font sizes

[galdor]

I just realized that screenshots are truncated (the image height is not high enough to cover the entire text) for some font sizes. For example I have no problem with 10, but 12 is truncated.

Removing the :height attribute used in screenshot--format-text-only-buffer and screenshot--narrowed-clone-buffer fixes the problem. Of course in that case the text in the temporary buffer uses the font size of the original buffer.

I have no idea what could cause this issue, but you might have an idea :)