unit tests: fix bug in clear_recorded_errors
unit tests: fix bug in clear_recorded_errors

In the unit test infrastructure, clear_recorded_errors was leaving
g_recorded_errors pointing to uninitialized memory.

Signed-off-by: Colin McCabe <3142ce8a0bdba4a38073365893e6b74f72d9c512@alumni.cmu.edu>

cmccabe/lksmith,cmccabe/lksmith