Add support for serializing empty Variants.

diff --git a/base/variant.cpp b/base/variant.cpp
index 25c3975c4a0627c4bc6ff8c1501c56a5afab2753..d1bed800c3ad10cd0e2c183e33b132c5f2fb2203 100644 (file)
--- a/base/variant.cpp
+++ b/base/variant.cpp
@@ -96,6 +96,8 @@ cJSON *Variant::ToJson(void) const
                        Logger::Write(LogDebug, "base", "Ignoring unknown object while converting variant to JSON.");
                        return cJSON_CreateNull();
                }
+       } else if (m_Value.type() == typeid(boost::blank)) {
+               return cJSON_CreateNull();
        } else {
                throw runtime_error("Invalid variant type.");
        }