Sentence splitter uses unbounded memory in -k mode

[kpu]

When used in -k mode, one would expect the sentence splitter to use a small amount of RAM, just enough to store a single line. However, it actually stores the entire split file before printing.

preprocess/moses/ems/support/split-sentences.perl

Line 119 in 344208c

$out .= &split_block($_,"");

@jelmervdl