FIX: Increase header and body buffer's size
FIX: Increase header and body buffer's size

So far we haven't developed a reliable algorithm to obtain
header or body buffer's size. Current values are not enough
for such messages as Order Cancel/Replace

Signed-off-by: Marat Stanichenko <146c4a279a7427b2cc19a19b6130cbb7ee404ab1@gmail.com>

penberg/libtrading,fengzhyuan/libtrading,etoestja/libtrading,femtotrader/libtrading,femtotrader/libtrading,mstanichenko/libtrading,libtrading/libtrading,jvirtanen/libtrading,fengzhyuan/libtrading,jvirtanen/libtrading,mstanichenko/libtrading,etoestja/libtrading,libtrading/libtrading,penberg/libtrading,Bitcoinsulting/libtrading,divaykin/libtrading,svdev/libtrading,NunoEdgarGub1/libtrading,NunoEdgarGub1/libtrading,Bitcoinsulting/libtrading,divaykin/libtrading,svdev/libtrading