[Fix] 'num_images_per_prompt' argument does not work in Controlnet

[yayoyo66]

Motivation

fix the bug link

Modification

modify the function prepare_control in 'mmagic/models/editors/controlnet/controlnet.py'

BC-breaking (Optional)

I guess no

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (8f2de0b) 82.59% compared to head (ec86654) 82.58%.

❗ Current head ec86654 differs from pull request most recent head eeacebf. Consider uploading reports for the commit eeacebf to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1929      +/-   ##
==========================================
- Coverage   82.59%   82.58%   -0.01%     
==========================================
  Files         413      413              
  Lines       27811    27814       +3     
  Branches     4366     4368       +2     
==========================================
  Hits        22971    22971              
- Misses       3895     3897       +2     
- Partials      945      946       +1     

Flag	Coverage Δ
unittests	82.58% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmagic/models/editors/controlnet/controlnet.py	47.38% <0.00%> (-0.45%)	⬇️

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[LeoXing1996]

Hey @yayoyo66, thanks for your controbution. We provide a better and more elegant fix in PR #1936.
Therefore we close this PR.