find-or-create-font-id in font-name-directory<%>

Gets the face name for a font ID, initializing the mapping for the face name if necessary.

Font ID are useful only as mapping indices for the-font-name-directory.

• (send a-font-name-directory find-or-create-font-id name family) -> exact integer
     name : string
     family : symbol in '(default decorative roman script swiss modern symbol system)