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Nathan Hjelm 4ccb20b097 btl: fix warning about enum type and modify btl_sendi to allow the
value NULL for the descriptor

The send inline optimization uses the btl_sendi function to achieve
lower latency and higher message rates. The problem is the btl_sendi
function was allowed to return a descriptor to the caller. This is fine
for some paths but not ok for the send inline optimization. To fix
this the btl now must be able to handle descriptor = NULL.
2014-11-19 11:33:03 -07:00
..
2014-10-22 10:32:33 -07:00