itch4: Optimize message decoding
itch4: Optimize message decoding

Optimize message decoding by eliminating extra call to 'buffer_size()'.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@kernel.org>

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