[Issues] Memory leak in ReduceTask recipe

[Jan Snigula]

Hi all,

there seems to be a severe memory leak in the ReduceTask recipe. When  
reducing large numbers of observations, we reproducibly ran into  
"cannot allocate memory" conditions. A solution might be to add free 
() functions to the various *Frame classes, that could be called by  
the Recipe in the loop over the observations, once one observation is  
finished...

Cheers,

Jan