- Fixed compilation warnings.

- Readded 'Auto placement' mode, with the old behavior, and made
  'Smart placement' mode behave in the new way.
  Auto and Smart are no longer aliases.

src/rootmenu.c

@@ -1270,9 +1270,9 @@ typedef struct {
 
 
 static int
-myCompare(dir_data *d1, dir_data *d2)
+myCompare(const void *d1, const void *d2)
 {
-    return strcmp(d1->name, d2->name);
+    return strcmp(((dir_data*) d1)->name, ((dir_data*) d2)->name);
 }