Picture counting problem

[starmilkxin]

Description

Picture counting problem makes two sheets have the same picture.

Steps to reproduce the issue:

func TestDeletePictureBug(t *testing.T) {
	f, err := excelize.OpenFile(filepath.Join("test", "Book1.xlsx"))
	assert.NoError(t, err)
	// f.countDrawings = 1, pkg: drawing1.xml, drawings: nil
	assert.NoError(t, f.DeletePicture("Sheet1", "A1"))
	// f.countDrawings = 2, pkg: (drawing1.xml, sheet1), drawings: (drawing1.xml, sheet1)
	f.NewSheet("Sheet3")
	assert.NoError(t, f.AddPicture("Sheet3", "P1", filepath.Join("test", "images", "excel.jpg"), ""))
	// f.countDrawings = 3, pkg: (drawing1.xml, sheet1), drawings: (drawing1.xml, sheet1), (drawing3.xml, sheet3)
	assert.NoError(t, f.AddPicture("Sheet2", "P1", filepath.Join("test", "images", "excel.jpg"), ""))
	// f.countDrawings = 4, pkg: (drawing1.xml, sheet1), drawings: (drawing1.xml, sheet1), (drawing3.xml, sheet3), (drawing4.xml, sheet2)
	assert.NoError(t, f.DeletePicture("Sheet2", "P1"))
	f.DeleteSheet("Sheet1")
	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestDeletePicture1.xlsx")))
	f, err = excelize.OpenFile(filepath.Join("test", "TestDeletePicture1.xlsx"))
	assert.NoError(t, err)
	// f.countDrawings = 3, pkg: (drawing1.xml, sheet1),(drawing3.xml, sheet3), (drawing4.xml, sheet2), drawings: nil
	f.NewSheet("Sheet1")
	assert.NoError(t, f.AddPicture("Sheet1", "H1", filepath.Join("test", "images", "pic.jpg"), `{"x_scale": 0.5, "y_scale": 0.5}`))
	// f.countDrawings = 4, pkg: (drawing1.xml, sheet1),(drawing3.xml, sheet3), (drawing4.xml, sheet2), drawings: (drawing4.xml, sheet1)
	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestDeletePicture2.xlsx")))
	// sheet1 and sheet2 all have pic.jpg !
}

Describe the results you received:
sheet1 and sheet2 all have pic.jpg

Describe the results you expected:
only sheet2 has pic.jpg

Output of go version:

go1.18.3 windows/amd64

Excelize version or commit ID:

v2.6.1

Environment details (OS, Microsoft Excel™ version, physical, etc.):

[starmilkxin]

Book1.xlsx and excel.jpg are under excelize's path "test" and "test/images"

[xuri]

Thanks for your feedback. I have made a fix for this issue, please upgrade to the master branch code.