fix LabelTTF::getBoundingBox() position error
code tidy
tab to spaces
Merge pull request #7652 from zhiqiangxu/labelbmfont_getboundingbox

bug fix for LabelBMFont::getBoundingBox()
[ci skip]
Merge pull request #7622 from rny/LabelTTF

fix LabelTTF::getBoundingBox() position error