Incorrect exception type is thrown in PointCloud::at

[csukuangfj]

Your Environment

• PCL Version: the master branch

Context

See the code

pcl/common/include/pcl/point_cloud.h

Lines 282 to 289 in 3682b68

	inline const PointT&
	at (int column, int row) const
	{
	if (this->height > 1)
	return (points.at (row * this->width + column));
	else
	throw IsNotDenseException ("Can't use 2D indexing with a unorganized point cloud");
	}

pcl/common/include/pcl/point_cloud.h

Lines 296 to 303 in 3682b68

	inline PointT&
	at (int column, int row)
	{
	if (this->height > 1)
	return (points.at (row * this->width + column));
	else
	throw IsNotDenseException ("Can't use 2D indexing with a unorganized point cloud");
	}

Expected Behavior

It should throw

pcl/common/include/pcl/exceptions.h

Line 208 in 3682b68

class UnorganizedPointCloudException : public PCLException

Current Behavior

It throws

pcl/common/include/pcl/exceptions.h

Line 150 in 3682b68

class IsNotDenseException : public PCLException

Code to Reproduce

See the code above.

Possible Solution

Throw

pcl/common/include/pcl/exceptions.h

Line 208 in 3682b68

class UnorganizedPointCloudException : public PCLException