* core.c (core_file_command): Print frame at coredump with

* core.c (core_file_command):  Print frame at coredump with
its level number, by calling print_stack_frame.
* frame.h:  Add selected_frame_level, print_stack_frame.
* frame.h, stack.c:  Remove print_sel_frame, print_selected_frame.
* convex-tdep.c, convex-xdep.c, infcmd.c, inflow.c, infrun.c:
Change print_sel_frame and print_selected_frame callers to
print_stack_frame.

* dbxread.c (read_ofile_symtab):  Avoid empty else clause.
* symfile.c (free_named_symtabs):  Ditto.
* main.c (main):  wrap_here needs an arg.
* solib.c (find_solib):  Avoid memory access if _DYNAMIC is zero.
(solib_add):  Avoid noise.
(solib_create_inferior_hook):  Lint.
(sharedlibrary_command):  Move dont_repeat to here.
* utils.c (error):  Call wrap_here to force buffered output.

Small patches from Peter Schauer:

* coffread.c (start_symtab):  Free any existing line_vector before
malloc-ing new one.
(read_coff_symtab):  Ditto for type_vector.

* source.c (lines_to_list):  New variable, replacing function.
(all uses):  Use as variable.
(_initialize_source):  Add 'set listsize' and 'show listsize'.
* utils.c (lines_to_list):  Remove function.
* stack.c (print_frame_info):  Use as variable.
* defs.h (lines_to_list):  Remove declaration.