fix missing assignment

CHANGELOG

@@ -1,5 +1,8 @@
                                CHANGELOG
 
+4.5.2 (2021-01-09)
+• Fixed missing line in xmenu.c.
+
 4.5.1 (2021-01-09)
 • Fixed SHIFT key; it cleared the selection, now it doesn't.
 

xmenu.c

@@ -1383,6 +1383,7 @@ append:
 						break;
 					text[0] = '\0';
 				}
+				action = ACTION_SELECT | ACTION_DRAW;
 				break;
 			}
 			select = item;