Bug with line-height (font shorthand)

[David Hyatt]

The font shorthand property has a bug with the application of 
line-height.  The test case that triggered the bug was

font: 1em/1em Ahem;

The problem is that font has not yet been updated when line-height 
needs to check the font-size, so it gets the wrong font-size.  The 
following patch fixes the problem by adding an update if needed before 
applying the line-height rule.

======

	   applyRule( CSS_PROP_FONT_SIZE, font->size );

             // Line-height can depend on font().pixelSize(), so we have 
to update the font
             // before we evaluate line-height, e.g., font: 1em/1em
             if (fontDirty)
                 CSSStyleSelector::style->htmlFont().update( 
paintDeviceMetrics );

             applyRule( CSS_PROP_LINE_HEIGHT, font->lineHeight );

======

Cheers,
Dave
(hyatt@apple.com)