Correction to use of TEMP_FAILURE_RETRY in send_prop_msg

Correction to use of TEMP_FAILURE_RETRY in send_prop_msg

RETRY macro may retry command if result is -1. In this
case the command was "connect < 0" instead of just
connect. The comparison will not return -1 and thus
retry is never done. This is now corrected so that
interrupts will cause retry instead of fail.

(There was no other negative side effect of the bug.
The result code from RETRY was used in an if-statement
and it would be true for all negative connect results.
This was according to expectations.)

Change-Id: Ie206b39878e9befea4e3be9a4061ee39eb232d80