Intialize regionMap
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		@ -19,9 +19,9 @@ func (m WorldMap) GetTile(x int, y int) (int, error) {
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}
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					}
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func (m WorldMap) GetJsonRegion(start_x, end_x, start_y, end_y int) ([]byte, error) {
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					func (m WorldMap) GetJsonRegion(start_x, end_x, start_y, end_y int) ([]byte, error) {
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	regionMap := make(map[int]map[int]int)
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						regionMap := map[int]map[int]int{}
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	for x := start_x; x < end_x; x++ {
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						for x := start_x; x < end_x; x++ {
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							regionMap[x] = map[int]int{}
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		for y := start_y; y < end_y; y++ {
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							for y := start_y; y < end_y; y++ {
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			if result, err := m.GetTile(x, y); err != nil {
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								if result, err := m.GetTile(x, y); err != nil {
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				return nil, err
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									return nil, err
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