File abook-gcc15.patch of Package abook

diff -upr abook-0.6.1.orig/mbswidth.c abook-0.6.1/mbswidth.c
--- abook-0.6.1.orig/mbswidth.c	2025-06-11 07:17:46.708829386 +0000
+++ abook-0.6.1/mbswidth.c	2025-06-11 07:19:40.177240199 +0000
@@ -63,7 +63,7 @@
 #	warn "this configure-time declaration test was not run"
 #endif
 #if !HAVE_DECL_WCWIDTH
-int wcwidth ();
+int wcwidth (wchar_t);
 #endif
 
 #ifndef wcwidth