Graph contrib

[Matthew Mitchell]

Hi, 

Can you help with the following.

I just tried to compile the demo with the GraphLib and got the following
messages: 

gcc -c -g -Wall -Wno-import -I/opt/packages/swarm-961002/include
-I/usr/local/in
clude  FEntity.m
gcc -c -g -Wall -Wno-import -I/opt/packages/swarm-961002/include
-I/usr/local/in
clude  FLink.m
gcc -c -g -Wall -Wno-import -I/opt/packages/swarm-961002/include
-I/usr/local/in
clude  ILink.m
ILink.m: In function `_i_ILink__createEnd':
ILink.m:10: warning: cannot find method.
ILink.m:10: warning: return type for `setColor:' defaults to id
gcc -c -g -Wall -Wno-import -I/opt/packages/swarm-961002/include
-I/usr/local/in
clude  BLink.m
BLink.m: In function `_i_BLink__createEnd':
BLink.m:10: warning: cannot find method.
BLink.m:10: warning: return type for `setColor:' defaults to id       

Thanks 

Matt