#4949 fix bug in show engine tokudb status closes[t:4949]

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@44043 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/hatoku_hton.cc

@@ -1239,7 +1239,7 @@ static int tokudb_get_user_data_size(TABLE *table, THD *thd, bool exact) {
     return error;
 }
 
-#define STATPRINT(legend, val) stat_print(thd, \
+#define STATPRINT(legend, val) if (legend && val) stat_print(thd,   \
                                           tokudb_hton_name, \
                                           strlen(tokudb_hton_name), \
                                           legend, \