Use UTF8_STRING instead of COMPOUND_TEXTHEADmaster

Using XCompoundTextStyle makes gnome-shell issue countless warnings in
the message log when switching between tabs or selecting text:

gnome-shell[5357]: Window manager warning: Window 0x800003 has property
_NET_WM_NAME that was expected to have type UTF8_STRING format 8 and
actually has type COMPOUND_TEXT format 8 n_items 0. This is most likely
an application bug, not a window manager bug. The window has
title="0:2:vim - "hostname" " class="tabbed" name="tabbed"

1 files changed, 1 insertions, 1 deletions

diff --git a/tabbed.c b/tabbed.c
index 81be5e4..e5664aa 100644
--- a/tabbed.c
+++ b/tabbed.c
@@ -1264,7 +1264,7 @@ xsettitle(Window w, const char *str)
 	XTextProperty xtp;
 
 	if (XmbTextListToTextProperty(dpy, (char **)&str, 1,
-	    XCompoundTextStyle, &xtp) == Success) {
+	    XUTF8StringStyle, &xtp) == Success) {
 		XSetTextProperty(dpy, w, &xtp, wmatom[WMName]);
 		XSetTextProperty(dpy, w, &xtp, XA_WM_NAME);
 		XFree(xtp.value);