warn, var i already used

[marakew]

core.cpp(10227): warning C4456: declaration of 'i' hides previous local declaration
core.cpp(10064): note: see declaration of 'i'

srt/srtcore/core.cpp

Line 10227 in 8d1643e

for (loss_seqs_t::iterator i = srt_loss_seqs.begin(); i != srt_loss_seqs.end(); ++i)

fix by rename of var i to another name