befog run should ignore the stderr line when there is no stderr

[flores]

It is nice befog run shows both std out and std err, but when std err is empty is should just skip that output line.

Example:

/befog# bin/befog run quarter-shark -c 'ifconfig eth0 |grep "inet addr"'
Running command 'ifconfig eth0 |grep "inet addr"' for 50.18.3.87 ...
[50.18.3.87: STDOUT]           inet addr:10.173.30.224  Bcast:10.173.31.255  Mask:255.255.254.0
[50.18.3.87: STDERR] 
Running command 'ifconfig eth0 |grep "inet addr"' for 184.72.29.185 ...
[184.72.29.185: STDOUT]           inet addr:10.174.74.43  Bcast:10.174.75.255  Mask:255.255.254.0
[184.72.29.185: STDERR] 
Running command 'ifconfig eth0 |grep "inet addr"' for 204.236.182.190 ...
[204.236.182.190: STDOUT]           inet addr:10.174.65.43  Bcast:10.174.65.255  Mask:255.255.255.0
[204.236.182.190: STDERR] 
Running command 'ifconfig eth0 |grep "inet addr"' for 50.18.21.61 ...
[50.18.21.61: STDOUT]           inet addr:10.174.73.26  Bcast:10.174.73.255  Mask:255.255.255.0
[50.18.21.61: STDERR] 
Running command 'ifconfig eth0 |grep "inet addr"' for 204.236.152.224 ...
[204.236.152.224: STDOUT]           inet addr:10.174.255.115  Bcast:10.174.255.255  Mask:255.255.254.0
[204.236.152.224: STDERR] 

[automatthew]

DYODER fixed this with 31fbed6