Fix invalid output or crashes when calling a mixin which takes variable arguments from another mixin *also* taking variable arguments when no arguments are passed in
Fix invalid output or crashes when calling a mixin which takes variable arguments from another mixin *also* taking variable arguments when no arguments are passed in

FishingCactus/libsass,technoAri/libsass,rodneyrehm/libsass,TBAPI-0KA/NSass,moovweb/libsass,errorx666/libsass,webdev1001/libsass,saper/libsass,mtwebster/mint-libsass,TBAPI-0KA/NSass,am11/libsass,webdev1001/libsass,mtwebster/mint-libsass,FishingCactus/libsass,khchanel/libsass,moovweb/libsass,technoAri/libsass,rodneyrehm/libsass,am11/libsass,TBAPI-0KA/NSass,moovweb/libsass,errorx666/libsass,mikebarkas/libsass,mikebarkas/libsass,am11/libsass,panicinc/libsass,rodneyrehm/libsass,mikebarkas/libsass,TBAPI-0KA/NSass,webdev1001/libsass,panicinc/libsass,webdev1001/libsass,rodneyrehm/libsass,TBAPI-0KA/NSass,am11/libsass,khchanel/libsass,moovweb/libsass,technoAri/libsass,TBAPI-0KA/NSass,errorx666/libsass,mikebarkas/libsass,mtwebster/mint-libsass,saper/libsass,FishingCactus/libsass,admire93/libsass-python,errorx666/libsass,rodneyrehm/libsass,panicinc/libsass,khchanel/libsass,panicinc/libsass,FishingCactus/libsass,am11/libsass,webdev1001/libsass,mtwebster/mint-libsass,technoAri/libsass,dahlia/libsass-python,mikebarkas/libsass,technoAri/libsass,mtwebster/mint-libsass,khchanel/libsass,saper/libsass,saper/libsass,FishingCactus/libsass,saper/libsass,panicinc/libsass,dahlia/libsass-python,admire93/libsass-python,khchanel/libsass