do not round variation axes

we introduced this to possibly decrease memory footprint,
but some fonts are more granular than others

src/GPUFontLayer.cpp

@@ -98,7 +98,7 @@ void GPUFontLayer::setProps(const Props & props){
             glyphAppearance.letterSpacing = vProps.letterSpacing;
             for(const auto & fv : vProps.fontVariations){
                 glyphIdentity.coords.push_back(
-                    std::move(ofxGPUFont::float2f16dot16(round(fv.value * 0.1) * 10))     // convert to FT
+                    std::move(ofxGPUFont::float2f16dot16(fv.value))     // convert to FT
                     // NOTE: we are also rounding here, since in practice a variation
                     // of 100.0 will not look much different than 100.124
                     );