Prefer 'Qfoo' to 'intern ("foo")'

* buffer.c (syms_of_buffer):
* bytecode.c (exec_byte_code):
* callint.c (Fcall_interactively):
* callproc.c (create_temp_file):
* charset.c (define_charset_internal):
* coding.c (syms_of_coding):
* editfns.c (syms_of_editfns):
* emacs.c (main):
* fns.c (syms_of_fns):
* frame.c (delete_frame, Fframe_parameters):
* keyboard.c (syms_of_keyboard):
* keymap.c (syms_of_keymap):
* minibuf.c (read_minibuf, syms_of_minibuf):
* nsfns.m (ns_cursor_type_to_lisp):
* textprop.c (syms_of_textprop):
* xdisp.c (Fformat_mode_line, syms_of_xdisp):
* xfns.c (x_create_tip_frame, Fx_select_font):
* xml.c (parse_region):
Prefer constants like 'Qfoo' to calls like 'intern ("foo")'.
* buffer.c (syms_of_buffer): OK to do (put 'erase-buffer 'disabled
t) here now ...
(keys_of_buffer): ... instead of here.
* ftfont.c (syms_of_ftfont): Move DEFSYM of Qmono from here ...
* xfns.c (syms_of_xfns): ... to here, since ftfont.c is more
optional than xfns.c.

src/bytecode.c

@@ -1945,10 +1945,10 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth,
 	  /* Actually this is Bstack_ref with offset 0, but we use Bdup
 	     for that instead.  */
 	  /* CASE (Bstack_ref): */
-         call3 (intern ("error"),
-                build_string ("Invalid byte opcode: op=%s, ptr=%d"),
-                make_number (op),
-                make_number ((stack.pc - 1) - stack.byte_string_start));
+	  call3 (Qerror,
+		 build_string ("Invalid byte opcode: op=%s, ptr=%d"),
+		 make_number (op),
+		 make_number ((stack.pc - 1) - stack.byte_string_start));
 
 	  /* Handy byte-codes for lexical binding.  */
 	CASE (Bstack_ref1):