fix compiler warnings

storage/spider/spd_conn.cc

@@ -4565,16 +4565,18 @@ SPIDER_IP_PORT_CONN* spider_create_ipport_conn(SPIDER_CONN *conn)
       goto err_malloc_key;
     }
 
-    ret->key = (char *) my_malloc(ret->key_len, MY_ZEROFILL | MY_WME);
+    ret->key = (char *) my_malloc(ret->key_len + conn->tgt_host_length + 1,
+      MY_ZEROFILL | MY_WME);
     if (!ret->key) {
       pthread_cond_destroy(&ret->cond);
       pthread_mutex_destroy(&ret->mutex);
       goto err_malloc_key;
     }
+    ret->remote_ip_str = ret->key + ret->key_len;
 
     memcpy(ret->key, conn->conn_key, ret->key_len);
 
-    strncpy(ret->remote_ip_str, conn->tgt_host, sizeof(ret->remote_ip_str));
+    memcpy(ret->remote_ip_str, conn->tgt_host, conn->tgt_host_length);
     ret->remote_port = conn->tgt_port;
     ret->conn_id = conn->conn_id;
     ret->ip_port_count = 1; // init

storage/spider/spd_db_mysql.cc

@@ -14131,7 +14131,7 @@ int spider_mbase_handler::simple_action(
   SPIDER_DB_RESULT *res;
   SPIDER_SHARE *share = spider->share;
   uint pos = spider->conn_link_idx[link_idx];
-  spider_string *str;
+  spider_string *str = NULL;
   DBUG_ENTER("spider_mbase_handler::simple_action");
   switch (simple_action)
   {
@@ -14172,7 +14172,7 @@ int spider_mbase_handler::simple_action(
 #endif
     default:
       DBUG_ASSERT(0);
-      break;
+      DBUG_RETURN(0);
   }
   pthread_mutex_lock(&conn->mta_conn_mutex);
   SPIDER_SET_FILE_POS(&conn->mta_conn_mutex_file_pos);

storage/spider/spd_include.h

@@ -1452,7 +1452,7 @@ typedef struct st_spider_ip_port_conn {
 #ifdef SPIDER_HAS_HASH_VALUE_TYPE
   my_hash_value_type key_hash_value;
 #endif
-  char               remote_ip_str[SPIDER_CONN_META_BUF_LEN];
+  char               *remote_ip_str;
   long               remote_port;
   ulong              ip_port_count;
   volatile ulong     waiting_count;