Inconsistency in table_from_memory code

[coldfix]

When looking at the code that is used to read tables from memory, I noticed an inconsistency in the memory management:

The array buffer returned by table_get_column() is neither freed nor is it copied to the numpy array. This will result in either:

• a memory leak, if the table_get_column() returns copied data
• memory corruptions at some point (if still using the numpy array when MAD-X has decided to free the buffer)

UPDATE: Just realized that the second case should be no problem, since the array is copied over the Pipe immediately. Still, its worth mentioning, see 629ae41.

[Eothred]

I'm no genious here, I just tried to hack it together until it worked.. So feel free to make it more safe! Maybe that is why some of the models are crashing...