aLargeHalf = ((aSmallHalf + aSmallHalf) < aPixelSize) ? aSmallHalf + 1 : aSmallHalf;
aLargeHalf = aPixelSize - aSmallHalf;
DivideBCBorderSize(nscoord  aPixelSize,                   nscoord& aSmallHalf,                   nscoord& aLargeHalf){  aSmallHalf = aPixelSize / 2;  aLargeHalf = ((aSmallHalf + aSmallHalf) < aPixelSize) ? aSmallHalf + 1 : aSmallHalf;}