patch 8.2.2924: superfluous extern declaration

Problem:    Superfluous extern declaration.
Solution:   Delete the declaration. (Ken Takata, closes #8307)
diff --git a/src/main.c b/src/main.c
index de94a15..d418c13 100644
--- a/src/main.c
+++ b/src/main.c
@@ -260,8 +260,6 @@
 
 #ifdef MSWIN
     {
-	extern void set_alist_count(void);
-
 	// Remember the number of entries in the argument list.  If it changes
 	// we don't react on setting 'encoding'.
 	set_alist_count();
diff --git a/src/version.c b/src/version.c
index ee1dfa7..aaf27c1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2924,
+/**/
     2923,
 /**/
     2922,