cast to avoid warning.

src/partiview.cc

@@ -120,7 +120,7 @@ void pp_ui_postinit() {
 
 
   if(ppui.detached) {
-    char code[2] = { ppui.detached, '\0' };
+    char code[2] = { char(ppui.detached), '\0' };
     parti_detachview(code);
   }