Correct multi-line text spacing.
Correct multi-line text spacing.

Use double for offset when calculating bounding box, and don't
use ceiling, to prevent an extra row of pixels between lines in
multi-line text.

Change-Id: Ifd660e382cf8b946e23b58493c765d229d716652

demarle/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,msmolens/VTK,keithroe/vtkoptix,ashray/VTK-EVM,keithroe/vtkoptix,sankhesh/VTK,johnkit/vtk-dev,msmolens/VTK,candy7393/VTK,biddisco/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,biddisco/VTK,johnkit/vtk-dev,sankhesh/VTK,sumedhasingla/VTK,candy7393/VTK,hendradarwin/VTK,gram526/VTK,sumedhasingla/VTK,jmerkow/VTK,msmolens/VTK,hendradarwin/VTK,sankhesh/VTK,ashray/VTK-EVM,jmerkow/VTK,sankhesh/VTK,johnkit/vtk-dev,demarle/VTK,mspark93/VTK,ashray/VTK-EVM,johnkit/vtk-dev,johnkit/vtk-dev,SimVascular/VTK,candy7393/VTK,SimVascular/VTK,sankhesh/VTK,msmolens/VTK,SimVascular/VTK,SimVascular/VTK,hendradarwin/VTK,biddisco/VTK,collects/VTK,ashray/VTK-EVM,mspark93/VTK,ashray/VTK-EVM,gram526/VTK,sumedhasingla/VTK,demarle/VTK,hendradarwin/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,sankhesh/VTK,msmolens/VTK,demarle/VTK,biddisco/VTK,keithroe/vtkoptix,ashray/VTK-EVM,demarle/VTK,candy7393/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,keithroe/vtkoptix,SimVascular/VTK,mspark93/VTK,candy7393/VTK,keithroe/vtkoptix,jmerkow/VTK,hendradarwin/VTK,jmerkow/VTK,mspark93/VTK,ashray/VTK-EVM,collects/VTK,mspark93/VTK,mspark93/VTK,biddisco/VTK,demarle/VTK,mspark93/VTK,jmerkow/VTK,sumedhasingla/VTK,gram526/VTK,jmerkow/VTK,demarle/VTK,biddisco/VTK,candy7393/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,msmolens/VTK,ashray/VTK-EVM,sumedhasingla/VTK,keithroe/vtkoptix,jmerkow/VTK,keithroe/vtkoptix,msmolens/VTK,gram526/VTK,collects/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,sumedhasingla/VTK,SimVascular/VTK,mspark93/VTK,gram526/VTK,msmolens/VTK,candy7393/VTK,biddisco/VTK,gram526/VTK,hendradarwin/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,collects/VTK,collects/VTK,collects/VTK,johnkit/vtk-dev,demarle/VTK,sumedhasingla/VTK,gram526/VTK,candy7393/VTK,gram526/VTK,SimVascular/VTK