code-style: slight cleanups

* put TOP_STATUSBAR under the HAVE_LIBFONTS guard
* change get_win_title param to take unsigned char ptr
* init UTF8_STRING like other atoms

config.def.h

@@ -14,10 +14,10 @@ static const char *DEFAULT_MARK_COLOR = NULL;  /* NULL means it will default to
 static const char *DEFAULT_BAR_BG     = NULL;  /* NULL means it will default to window background */
 static const char *DEFAULT_BAR_FG     = NULL;  /* NULL means it will default to window foreground */
 static const char *DEFAULT_FONT       = "monospace-8";
-#endif
 
 /* if true, statusbar appears on top of the window */
 static const bool TOP_STATUSBAR = false;
+#endif /* HAVE_LIBFONTS */
 
 #endif
 #ifdef _IMAGE_CONFIG