Fix parsing @font-face

[mlocati]

Let's say we have this initial css code:

@font-face{
        font-family: somefont;
}
body{
        background: #f00;
}

Without this patch, \CssMin::minify returns

@font-face{background:#f00}

With this patch we have

@font-face{font-family:somefont}body{background:#f00}

[natxet]

Thanks

[mlocati]

👍