Alignment for second PShelf item is broken

Alignment is broken for all n+1 items is broken because GC returns wrong
height from the font metrics.

widgets/pshelf/org.eclipse.nebula.widgets.pshelf/src/org/eclipse/nebula/widgets/pshelf/PaletteShelfRenderer.java

@@ -55,14 +55,14 @@ public Point computeSize(GC gc, int wHint, int hHint, Object value)
 		return new Point(wHint,h);
 	}
 
-
 	/**
      * {@inheritDoc}
      */
     @Override
 	public void paint(GC gc, Object value)
     {
         PShelfItem item = (PShelfItem)value;
+		int fontHeight = gc.getFontMetrics().getHeight();
 
 		Color fore = parent.getForeground();
 
@@ -92,8 +92,8 @@ public void paint(GC gc, Object value)
 		}
 		gc.setForeground(fore);
 
-		int y2 = (getBounds().height - gc.getFontMetrics().getHeight())/2;
-		if ((getBounds().height - gc.getFontMetrics().getHeight()) % 2 != 0)
+		int y2 = (getBounds().height - fontHeight)/2;
+		if ((getBounds().height - fontHeight) % 2 != 0)
 			y2 ++;
 
         if (isHover() && !isSelected())