[Bugfix] Use always XkbConvertCase instead of XConvertCase when compiling

against X.Org 1.8.X and newer. Othewrise keysyms are not mapped correctly
to keycodes.

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=586406


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4057 3789f03b-4d11-0410-bbf8-ca57d06f2519

unix/xserver/hw/vnc/Input.cc

@@ -712,7 +712,12 @@ static KeySym KeyCodetoKeySym(KeySymsPtr keymap, int keycode, int col)
 	}
 
 	if ((per <= (col|1)) || (syms[col|1] == NoSymbol)) {
-		XConvertCase(syms[col&~1], &lsym, &usym);
+#if XORG >= 18
+		XkbConvertCase
+#else
+		XConvertCase
+#endif
+			    (syms[col&~1], &lsym, &usym);
 		if (!(col & 1))
 			return lsym;
 		/*