Set picture scale

[CHANTXU64]

Description

Incorrect picture scale.

Steps to reproduce the issue:

1. download https://git-scm.com/images/[email protected] to git.png
2. run:

f := excelize.NewFile()
f.AddPicture("Sheet1", "A1", "git.png", `{"x_scale": 0.33, "y_scale": 0.33}`)
f.SaveAs("gitlogo.xlsx")

Describe the results you received:

in wps:
scale height: 31%
scale width: 36%

Describe the results you expected:

in wps:
scale height: 33%
scale width: 33%

Output of go version:

go version go1.18.1 linux/amd64

Excelize version or commit ID:

eed431e

Environment details (OS, Microsoft Excel™ version, physical, etc.):
Linux x86_64, wps-office-cn 11.1.0.10976-2

[xuri]

This issue is duplicate with #248 and #212.

[xuri]

I will close this issue and move discuss on #248.