Fix armhf segfault in error message handling #15
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On armhf the return value of an error to get a message gets read as
value 255 which qualifies as >0. But going on the message pointer has
a value of 0x25000000 and later on segfaults when trying to access that.
Fixes #14
Signed-off-by: Christian Ehrhardt christian.ehrhardt@canonical.com