(enum Lisp_Type): Delete Lisp_Buffer.

(enum Lisp_Type): Delete Lisp_Buffer.
(enum Lisp_Misc_Type): Add Lisp_Misc_Float (not yet used).

(XSETBUFFER, BUFFERP, GC_BUFFERP): Rewrite to use pseudovectors.

(PVEC_BUFFER, PVEC_PROCESS, PVEC_FRAME, PVEC_COMPILED)
(PVEC_WINDOW, PVEC_WINDOW_CONFIGURATION, PVEC_SUBR):
Now enumeration constants, not macros.
(PVEC_FLAG): Enumeration alias for PSEUDOVECTOR_FLAG.