Add a register_option overload to GncOptionDB

For compatibility with existing scheme code.

libgnucash/app-utils/gnc-optiondb-impl.hpp

@@ -84,6 +84,7 @@ public:
     size_t num_sections() const noexcept { return m_sections.size(); }
     bool get_changed() const noexcept { return m_dirty; }
     void register_option(const char* section, GncOption&& option);
+    void register_option(const char* section, GncOption* option);
     void unregister_option(const char* section, const char* name);
     void set_default_section(const char* section);
     const GncOptionSection* const get_default_section() const noexcept;

libgnucash/app-utils/gnc-optiondb.cpp

@@ -168,6 +168,13 @@ GncOptionDB::register_option(const char* sectname, GncOption&& option)
     m_sections.back()->add_option(std::move(option));
 }
 
+void
+GncOptionDB::register_option(const char* sectname, GncOption* option)
+{
+    register_option(sectname, std::move(*option));
+    delete option;
+}
+
 void
 GncOptionDB::unregister_option(const char* sectname, const char* name)
 {

libgnucash/app-utils/gnc-optiondb.i

@@ -364,6 +364,11 @@ wrap_unique_ptr(GncOptionDBPtr, GncOptionDB);
 
 %ignore gnc_option_to_scheme;
 %ignore gnc_option_from_scheme;
+/* GncOptionDB::register_option comes in GncOption* and GncOption&&
+ * overloads. The latter isn't useful to SWIG, ignore it.
+ */
+%ignore GncOptionDB::register_option(const char*, GncOption&&);
+
 /* The following functions are overloaded in gnc-optiondb.hpp to provide both
  * GncOptionDB* and GncOptionDBPtr& versions. That confuses SWIG so ignore the
  * raw-ptr version.