This function deletes the current element in the array. Like you were using a list,
all other elements are shift to fill the gap, so ie. if you are deleteing element
number 10, the 11th element will become the 10th and so on.
Inputs
array_master
Pointer to a valid afc_array_master instance.
Result
a valid pointer to the data contained in the next avaible element, or NULL if array
is now empty.