added win32 hypot _hypot ifdef
added win32 hypot _hypot ifdef

Funcan/heekscad,haiqiangwang/heekscad,satovey/heekscad,haiqiangwang/heekscad,Funcan/heekscad,Funcan/heekscad,satovey/heekscad,haiqiangwang/heekscad,satovey/heekscad,haiqiangwang/heekscad,Funcan/heekscad,satovey/heekscad