Added missing return on loadData (failure on Windows)
Added missing return on loadData (failure on Windows)

cjh1/tomviz,cjh1/tomviz,Hovden/tomviz,yijiang1/tomviz,thewtex/tomviz,OpenChemistry/tomviz,cryos/tomviz,Hovden/tomviz,cryos/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,thewtex/tomviz,OpenChemistry/tomviz,mathturtle/tomviz,yijiang1/tomviz,cjh1/tomviz,thewtex/tomviz,cryos/tomviz,mathturtle/tomviz