cwm no blank labels

[Thomas Pfaff]

This diff disallows setting blank labels and pressing Esc while editing
the current one will leave it unchanged. I don't see the point in allowing
empty labels as the windows will just show up as blank entries in the menu.

Also remove `current' variable and just use `cc->label'.

Index: kbfunc.c
===================================================================
RCS file: /cvs/OpenBSD/xenocara/app/cwm/kbfunc.c,v
retrieving revision 1.6
retrieving revision 1.6.4.3
diff -u -p -r1.6 -r1.6.4.3
--- kbfunc.c    22 Dec 2009 13:11:37 -0000      1.6
+++ kbfunc.c    16 Jan 2010 17:01:54 -0000      1.6.4.3
@@ -400,18 +400,17 @@ kbfunc_client_label(struct client_ctx *c
 {
        struct menu     *mi;
        struct menu_q    menuq;
-       char            *current;
 
        TAILQ_INIT(&menuq);
 
-       current = cc->label;
-
-       if ((mi = menu_filter(cc->sc, &menuq, "label", current, 1,
+       if ((mi = menu_filter(cc->sc, &menuq, "label", cc->label, 1,
            search_match_text, NULL)) != NULL) {
-               if (cc->label != NULL)
-                       xfree(cc->label);
-               cc->label = xstrdup(mi->text);
-               xfree(mi);
+               if (strlen(mi->text) > 0) {
+                       if (cc->label != NULL)
+                               xfree(cc->label);
+                       cc->label = xstrdup(mi->text);
+                       xfree(mi);
+               }
        }
 }