Fixed char output

src/emitter.cpp

@@ -813,7 +813,7 @@ namespace YAML
 			return *this;
 
         PrepareNode(EmitterNodeType::Scalar);
-        m_stream << ch;
+        Utils::WriteChar(m_stream, ch);
         StartedScalar();
 
 		return *this;

util/sandbox.cpp

@@ -4,7 +4,9 @@
 int main()
 {
     YAML::Emitter out;
-    out << YAML::DoubleQuoted << "Hello, World!\n";
+    out << YAML::BeginSeq;
+    out << ':';
+    out << YAML::EndSeq;
     
     std::cout << out.c_str() << "\n";
     return 0;