asterisk, upstream fix for ASTERISK-28215

Ref: http://git.asterisk.org/gitweb/?p=asterisk/asterisk.git;a=commit;h=e137086163b00ce4947aa9335aae7f45956bbe75

package/asterisk/asterisk-13-upstream-ASTERISK-28215.patch

@@ -0,0 +1,46 @@
+X-Git-Url: http://git.asterisk.org/gitweb/?p=asterisk%2Fasterisk.git;a=blobdiff_plain;f=apps%2Fapp_voicemail.c;h=1dd7aa0d07263315f53bd93203237849fca30e90;hp=85e1c38e00b823c624b5a7700e05947b1c503f37;hb=e137086163b00ce4947aa9335aae7f45956bbe75;hpb=ead94ad6213ce91b42151639fa6d10b5d8b8066b
+
+diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
+index 85e1c38..1dd7aa0 100644
+--- a/apps/app_voicemail.c
++++ b/apps/app_voicemail.c
+@@ -2026,10 +2026,6 @@ static void free_user(struct ast_vm_user *vmu)
+ 		return;
+ 	}
+
+-	if (!ast_strlen_zero(vmu->mailbox)) {
+-		ast_delete_mwi_state_full(vmu->mailbox, vmu->context, NULL);
+-	}
+-
+ 	ast_free(vmu->email);
+ 	vmu->email = NULL;
+ 	ast_free(vmu->emailbody);
+@@ -2042,6 +2038,19 @@ static void free_user(struct ast_vm_user *vmu)
+ 	}
+ }
+
++static void free_user_final(struct ast_vm_user *vmu)
++{
++	if (!vmu) {
++		return;
++	}
++
++	if (!ast_strlen_zero(vmu->mailbox)) {
++		ast_delete_mwi_state_full(vmu->mailbox, vmu->context, NULL);
++	}
++
++	free_user(vmu);
++}
++
+ static int vm_allocate_dh(struct vm_state *vms, struct ast_vm_user *vmu, int count_msg) {
+
+ 	int arraysize = (vmu->maxmsg > count_msg ? vmu->maxmsg : count_msg);
+@@ -13491,7 +13500,7 @@ static void free_vm_users(void)
+ 	AST_LIST_LOCK(&users);
+ 	while ((current = AST_LIST_REMOVE_HEAD(&users, list))) {
+ 		ast_set_flag(current, VM_ALLOCED);
+-		free_user(current);
++		free_user_final(current);
+ 	}
+ 	AST_LIST_UNLOCK(&users);
+ }