Get rid of init_eff_chains()
Get rid of init_eff_chains()

init_eff_chains() was a special case of add_eff_chain(), the two
being identical when eff_chain_count == 0; use only add_eff_chain()
in all places.

Also fixes a memory leak when using an effects file, where memory for
the first effects chain would be allocated twice, once by each of the
functions.

Distrotech/sox,Motiejus/sox,davel/sox,Distrotech/sox,uklauer/sox,MageSlayer/sox,jacksonh/sox,uklauer/sox,Distrotech/sox,jacksonh/sox,CaptainHayashi/sox,Motiejus/sox,davel/sox,mhartzel/sox_personal_fork,cbagwell/sox,cbagwell/sox,pcqpcq/sox,jacksonh/sox,jacksonh/sox,CaptainHayashi/sox,Distrotech/sox,MageSlayer/sox,davel/sox,cbagwell/sox,Motiejus/sox,CaptainHayashi/sox,davel/sox,Motiejus/sox,CaptainHayashi/sox,pcqpcq/sox,MageSlayer/sox,mhartzel/sox_personal_fork,cbagwell/sox,MageSlayer/sox,mhartzel/sox_personal_fork,mhartzel/sox_personal_fork,MageSlayer/sox,pcqpcq/sox,uklauer/sox,pcqpcq/sox,uklauer/sox