Getting warning: "annot type '8' has no fill color" on version 1.18.15 but not in 1.18.14

[zwitterion]

Please provide all mandatory information!

Describe the bug (mandatory)

I get the warning: warning: annot type '8' has no fill color after calling add_highlight_annot()
This warning only shows in 1.18.15. If I revert to 1.18.14, I don't get the warning.

To Reproduce (mandatory)

Explain the steps to reproduce the behavior, For example, include a minimal code snippet, example files, etc.
import fitz
pdf = fitz.open('some.pdf")
pg = pdf.load_page(0)
ha = page.add_highlight_annot(clip=[0,0,1,1])
ha.set_colors(stroke=clr) # this gives a warning
ha.set_colors(stroke=clr, fill=(1,1,1)) # this also gives a warning
ha.set_colors(stroke=clr, fill=None) # this also gives a warning
....

Expected behavior (optional)

Describe what you expected to happen (if not obvious).
no warning

Screenshots (optional)

If applicable, add screenshots to help explain your problem.

Your configuration (mandatory)

• Operating system, potentially version and bitness
  3.8.10 (default, May 12 2021, 15:46:43)
  [GCC 8.3.0]
  linux

PyMuPDF 1.18.15: Python bindings for the MuPDF 1.18.0 library.
Version date: 2021-07-10 00:00:01.
Built for Python 3.8 on linux (64-bit).

• PyMuPDF version, installation method (wheel or generated from source).
  1.18.15 installed via PIP

For example, the output of print(sys.version, "\n", sys.platform, "\n", fitz.__doc__) would be sufficient (for the first two bullets).

Additional context (optional)

Add any other context about the problem here.

[JorjMcKie]

Forgot to check a condition. Will be fixed in next version.
BTW: this is misplaced message only - it has no functional impact whatsoever.

[JorjMcKie]

New vesion 1.18.16 uploaded to PyPI.