Issue 10062 - Trying to move a message without selecting one first results in memory corruption

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@71750 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -5478,6 +5478,11 @@ static int vm_execmain(struct ast_channel *chan, void *data)
 				cmd = ast_play_and_wait(chan, "vm-nomore");
 			break;
 		case '9':
+			if (vms.curmsg < 0 || vms.curmsg > vms.lastmsg) {
+				/* No message selected */
+				cmd = 0;
+				break;
+			}
 			if (useadsi)
 				adsi_folders(chan, 1, "Save to folder...");
 			cmd = get_folder2(chan, "vm-savefolder", 1);