Fix --with-x-toolkit=no build breakage

* oldXMenu/Create.c (XMenuCreate): Add const modifier to variable def_val.
* oldXMenu/Create.c:
* src/frame.h: Add const modifier to return type of x_get_resource_string.
* src/frame.c (x_get_resource_string): Exempt x_get_string_resource from
renaming generic x_* identifiers.

1 files changed, 2 insertions, 2 deletions

diff --git a/oldXMenu/Create.c b/oldXMenu/Create.c
index 2ea84e921a1..58d17826623 100644
--- a/oldXMenu/Create.c
+++ b/oldXMenu/Create.c
@@ -87,7 +87,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #define XASSOC_TABLE_SIZE       64
 
-char *x_get_resource_string (char const *, char const *);
+const char *x_get_resource_string (char const *, char const *);
 
 
 
@@ -107,7 +107,7 @@ XMenuCreate(Display *display, Window parent, register char const *def_env)
                                 /* Window ID of the menu's parent window. */
                                 /* X Defaults program environment name. */
 {
-  register char *def_val;       /* X Default value temp variable. */
+  register const char *def_val; /* X Default value temp variable. */
 
   register XMenu *menu;         /* Pointer to the new menu. */
   XMStyle menu_style;           /* Menu display style. */