patch 9.1.0584: Warning about redeclaring f_id() non-static

Problem:  Warning about redeclaring f_id() non-static
Solution: Declare f_id() static (John Marriott)

closes: #15257

Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/evalfunc.c b/src/evalfunc.c
index c092421..a5e4b20 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -7534,7 +7534,7 @@
  * Currently only valid for object/container types.
  * Return empty string if not an object.
  */
-    void
+    static void
 f_id(typval_T *argvars, typval_T *rettv)
 {
     char    numbuf[NUMBUFLEN];
diff --git a/src/version.c b/src/version.c
index 6633b7b..c0fdd46 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    584,
+/**/
     583,
 /**/
     582,