Fixed two warnings from Doxygen.

src/Fl_Help_View.cxx

@@ -3282,7 +3282,7 @@ Fl_Help_View::~Fl_Help_View()
 /** Loads the specified file.
 
  This method loads the specified file or URL. The filename may end in a
- '#name' style target.
+ \c \#name style target.
 
  If the URL starts with \a ftp, \a http, \a https, \a ipp, \a mailto, or
  \a news, followed by a colon, FLTK will use fl_open_uri() to show the

src/Fl_Menu.cxx

@@ -1047,6 +1047,9 @@ const Fl_Menu_Item* Fl_Menu_Item::pulldown(
   \param[in] title a character string title for the menu.  If
   non-zero a small box appears above the menu with the title in it.
 
+  \param[in] picked if this pointer is not NULL, the popup menu will appear
+  so that the picked menu is under the mouse pointer.
+
   \param[in] menu_button is a pointer to an Fl_Menu_ from which the color and
   boxtypes for the menu are pulled.  If NULL then defaults are used.