I get:

4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(238): warning C4365: 'initializing': conversion from 'int' to 'unsigned int', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(238): warning C4365: 'initializing': conversion from 'int' to 'const unsigned int', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(276): warning C4365: 'argument': conversion from 'int' to 'const std::size_t', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(309): warning C4267: 'argument': conversion from 'size_t' to 'int', possible loss of data
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(309): warning C4365: 'argument': conversion from 'std::size_t' to 'int', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(310): warning C4267: 'argument': conversion from 'size_t' to 'int', possible loss of data
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(310): warning C4365: 'argument': conversion from 'std::size_t' to 'int', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(312): warning C4365: 'argument': conversion from 'unsigned int' to 'int', signed/unsigned mismatch
4>C:\CraftRoot\labplot\src\backend\worksheet\plots\cartesian\XYDataReductionCurve.cpp(313): warning C4365: 'argument': conversion from 'unsigned int' to 'int', signed/unsigned mismatch