Use const char* instead of char*.

Reduce the number of warnings with -Wwrite-strings.
* src/xrdb.c (get_environ_db, get_system_name):
* src/unexelf.c (find_section):
* src/term.c (string_cost, string_cost_one_line, per_line_cost)
(get_named_tty, init_tty):
* src/sysdep.c (sys_subshell):
* src/sound.c (sound_perror, sound_warning, vox_open, vox_init)
(alsa_sound_perror, alsa_open, alsa_configure, alsa_init):
* src/search.c (Freplace_match):
* src/process.c (Fmake_network_process, send_process, init_process):
* src/lread.c (Fload, init_lread):
* src/keymap.c (Fdescribe_buffer_bindings, describe_map_tree):
* src/keyboard.c (parse_tool_bar_item, struct event_head):
* src/gtkutil.h (xg_get_font_name):
* src/gtkutil.c (get_dialog_title, create_dialog, xg_get_font_name)
(make_widget_for_menu_item, make_menu_item, create_menus)
(xg_make_tool_item):
* src/font.c (parse_matrix, font_parse_name):
* src/floatfns.c (rounding_driver, float_error_fn_name):
* src/filelock.c (get_boot_time_1, lock_file_1):
* src/fileio.c (barf_or_query_if_file_exists, check_writable):
* src/editfns.c (get_system_name, get_operating_system_release)
(Fencode_time, Fset_time_zone_rule):
* src/dispextern.h (string_cost, per_line_cost, get_named_tty, init_tty):
* src/buffer.c (defvar_per_buffer): Use const.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/font.c b/src/font.c
index f902ff4c588..1ac994d6375 100644
--- a/src/font.c
+++ b/src/font.c
@@ -699,9 +699,9 @@ font_put_extra (Lisp_Object font, Lisp_Object prop, Lisp_Object val)
 
 /* Font name parser and unparser */
 
-static int parse_matrix (char *);
+static int parse_matrix (const char *);
 static int font_expand_wildcards (Lisp_Object *, int);
-static int font_parse_name (char *, Lisp_Object);
+static int font_parse_name (const char *, Lisp_Object);
 
 /* An enumerator for each field of an XLFD font name.  */
 enum xlfd_field_index
@@ -758,7 +758,7 @@ enum xlfd_field_mask
    -1.  */
 
 static int
-parse_matrix (char *p)
+parse_matrix (const char *p)
 {
   double matrix[4];
   char *end;
@@ -1765,7 +1765,7 @@ font_unparse_gtkname (Lisp_Object font, struct frame *f, char *name, int nbytes)
    0.  Otherwise return -1.  */
 
 static int
-font_parse_name (char *name, Lisp_Object font)
+font_parse_name (const char *name, Lisp_Object font)
 {
   if (name[0] == '-' || strchr (name, '*') || strchr (name, '?'))
     return font_parse_xlfd (name, font);