TAP-plugins

The equalizer instance structure keeps pointers to
ports and old port values (e.g. old_ch0f, etc.) to
minimize calls to eq_set_params() during run() calls.
However, instantiate_eq() never initializes tge old_*
values so they will be filled with junk from the heap.

This is generally not a problem, since the junk values
will not match the set port values and eq_set_params()
will be called anyway. But, I have an application that
creates and deletes equalizer instances sporadically.
It works out that occasionally the same area of heap
gets used, resulting in the old_* values being the same
and eq_set_params() never getting called.

This may be an arcane issue, but using uninitialized
variable values is generally not a good practice. This
can easily be rectified by initializing the eq
structure in instantiate_eq(), such as by adding a
memset(ptr, 0, sizeof(eq)) on line 223 of tap_eq.c
after the malloc().