xim: clear callback preedit on owner loss

strans.c

@@ -798,7 +798,9 @@ static void
 imhandlekey(Keyreq *kr)
 {
 	Keyres res;
+	void *oldowner;
 
+	oldowner = activeowner;
 	sclear(&res.commit);
 	sclear(&res.preedit);
 	res.eaten = 1;
@@ -845,6 +847,8 @@ imhandlekey(Keyreq *kr)
 		}
 		break;
 	}
+	if(activeowner != oldowner)
+		ximownernotify();
 	if(kr->owner == activeowner){
 		if(search.lang)
 			res.preedit = search.text;