Frees the memory allocated for the #GString. If @free_segment is %TRUE it also frees the character data. If it's %FALSE, the caller gains ownership of the buffer and must free it after use with g_free().
if %TRUE, the actual character data is freed as well
Return: the character data of @string (i.e. %NULL if @free_segment is %TRUE)
See Implementation
Frees the memory allocated for the #GString. If @free_segment is %TRUE it also frees the character data. If it's %FALSE, the caller gains ownership of the buffer and must free it after use with g_free().