Use eina error logging, instead of plain printfs.

experimental/ecdb/trunk/src/ecdb_about.c

@@ -37,7 +37,7 @@ ecdb_about_show(void)
 
    if (!win)
    {
-      printf("Cannot create the about window!\n");
+      EINA_ERROR_PWARN("Cannot create the about window!\n");
       return;
    }