Use sprintf return value instead of invoking strlen on result.
In the old days this wasn't portable, since some sprintf implementations returned char *. But they died out years ago and Emacs already assumes sprintf returns int. Similarly for float_to_string. This patch speeds up (number-to-string 1000) by 3% on Fedora 15 x86-64. * ccl.c (ccl_driver): * character.c (string_escape_byte8): * data.c (Fnumber_to_string): * doprnt.c (doprnt): * print.c (print_object): * xdisp.c (message_dolog): * xfns.c (syms_of_xfns): Use sprintf or float_to_string result to avoid need to call strlen. * data.c (Fnumber_to_string): Use make_unibyte_string, since the string must be ASCII. * lisp.h, print.c (float_to_string): Now returns int length. * term.c (produce_glyphless_glyph): Use sprintf result rather than recomputing it.
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