Fix compilation for Qt-projects (#918)
Fix compilation for Qt-projects (#918)

Not use 'emit' as variable name, in Qt Framework it reserved word
dand-oss/yaml-cpp,dand-oss/yaml-cpp,jbeder/yaml-cpp,graehl/yaml-cpp,loot/yaml-cpp,WrinklyNinja/yaml-cpp,loot/yaml-cpp,graehl/yaml-cpp,jbeder/yaml-cpp,loot/yaml-cpp,WrinklyNinja/yaml-cpp,dand-oss/yaml-cpp,jbeder/yaml-cpp,loot/yaml-cpp,dand-oss/yaml-cpp,jbeder/yaml-cpp,graehl/yaml-cpp,dand-oss/yaml-cpp,graehl/yaml-cpp,graehl/yaml-cpp,WrinklyNinja/yaml-cpp,jbeder/yaml-cpp,WrinklyNinja/yaml-cpp