Gets the value that is at the given index for the given tag in the given
list.
The resulting string in value will be in UTF-8 encoding and should be
freed by the caller using g_free when no longer needed. The
returned string is also guaranteed to be non-NULL and non-empty.
Free-function: g_free
Gets the value that is at the given index for the given tag in the given list. The resulting string in value will be in UTF-8 encoding and should be freed by the caller using g_free when no longer needed. The returned string is also guaranteed to be non-NULL and non-empty. Free-function: g_free