sparse_disp: changes to rounding to improve compatibility
sparse_disp: changes to rounding to improve compatibility

Older python versions require indices to be integers, replaced some instances of floor() with int()

njwilson23/StereoPipeline,oleg-alexandrov/StereoPipeline,njwilson23/StereoPipeline,njwilson23/StereoPipeline,aaronknister/StereoPipeline,ScottMcMichael/StereoPipeline,oleg-alexandrov/StereoPipeline,njwilson23/StereoPipeline,DougFirErickson/StereoPipeline,ScottMcMichael/StereoPipeline,DougFirErickson/StereoPipeline,NeoGeographyToolkit/StereoPipeline,ScottMcMichael/StereoPipeline,aaronknister/StereoPipeline,ScottMcMichael/StereoPipeline,aaronknister/StereoPipeline,NeoGeographyToolkit/StereoPipeline,aaronknister/StereoPipeline,ScottMcMichael/StereoPipeline,oleg-alexandrov/StereoPipeline,njwilson23/StereoPipeline,NeoGeographyToolkit/StereoPipeline,oleg-alexandrov/StereoPipeline,njwilson23/StereoPipeline,NeoGeographyToolkit/StereoPipeline,aaronknister/StereoPipeline,DougFirErickson/StereoPipeline,DougFirErickson/StereoPipeline,DougFirErickson/StereoPipeline,ScottMcMichael/StereoPipeline,oleg-alexandrov/StereoPipeline,DougFirErickson/StereoPipeline,NeoGeographyToolkit/StereoPipeline,NeoGeographyToolkit/StereoPipeline,oleg-alexandrov/StereoPipeline