Handle IME input

Thanks to nzl <uruabi@gmail.com> for the patch!

dmenu.c

@@ -552,7 +552,7 @@ run(void)
 	XEvent ev;
 
 	while (!XNextEvent(dpy, &ev)) {
-		if (XFilterEvent(&ev, win))
+		if (XFilterEvent(&ev, None))
 			continue;
 		switch(ev.type) {
 		case Expose:
@@ -664,6 +664,7 @@ setup(void)
 	                XNClientWindow, win, XNFocusWindow, win, NULL);
 
 	XMapRaised(dpy, win);
+	XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
 	if (embed) {
 		XSelectInput(dpy, parentwin, FocusChangeMask);
 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
@@ -729,6 +730,8 @@ main(int argc, char *argv[])
 
 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 		fputs("warning: no locale support\n", stderr);
+	if (!XSetLocaleModifiers(""))
+		fputs("warning: no locale modifiers support\n", stderr);
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("cannot open display");
 	screen = DefaultScreen(dpy);