* etags.c (grow_linebuffer): New function.
(GROW_LINEBUFFER): Macro deleted. All callers changed.
(make_tag): Macro renamed to make_C_tag. All callers changed.
(<stdlib.h>, <string.h>) [STDC_HEADERS]: New #include's.
(Prolog_functions): prolog_skip_comment was called with wrong
number of arguments.
(xrealloc): fatal was called with wrong number of arguments