loader: fix Volt loader
loader: fix Volt loader

aaronmjacobs/glad,hrehfeld/glad,dbralir/glad,QUSpilPrgm/glad,0x1100/glad,dbralir/glad,0x1100/glad,aaronmjacobs/glad,dbralir/glad,bsmr-opengl/glad,bsmr-opengl/glad,dbralir/glad,aaronmjacobs/glad,bsmr-opengl/glad,0x1100/glad,QUSpilPrgm/glad,hrehfeld/glad,valeriog-crytek/glad,bsmr-opengl/glad,QUSpilPrgm/glad,aaronmjacobs/glad,valeriog-crytek/glad,hrehfeld/glad,0x1100/glad,hrehfeld/glad,QUSpilPrgm/glad,valeriog-crytek/glad,valeriog-crytek/glad