commit a change to allow LCM messages up to 4GB in size. big messages were previously fragmented into 1400B packets. However, since lcm_udp uses a short for the number for fragments there can only be 64K fragments. The makes LCM use the 1400B packet size if the message would be broken up in to less than 64K fragments. Otherwise it increases the packet size to split the message into 64K packets
commit a change to allow LCM messages up to 4GB in size.
big messages were previously fragmented into 1400B packets. However, since lcm_udp uses a short for the number for fragments there can only be 64K fragments.
The makes LCM use the 1400B packet size if the message would be broken up in to less than 64K fragments. Otherwise it increases the packet size to split the message into 64K packets

git-svn-id: ddc8cd1199829c18fa5932f18135ba8f687fc5aa@638 989093bb-e83e-0410-a25a-9184cbcad8d0

tprk77/lcm-tprk77,tprk77/lcm-tprk77,tprk77/lcm-tprk77,tprk77/lcm-tprk77,tprk77/lcm-tprk77,tprk77/lcm-tprk77,tprk77/lcm-tprk77