fix: the split_threshold parameter does not work when running Split oversized images

[imnodb]

Description

if ratio >= 1.0 and ratio > split_threshold:
The and here should be or

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

[AUTOMATIC1111]

Yeah my bad, it was if A and B: do thing and I incorrectly inversed the condition as if not A and not B: return.

[xmattar]

do u know how i can load up this version of the webui? the new version bonked itself on the head