Fix pseudo leak
Fix pseudo leak

Once-allocated buffers (here a string) that aren't explicitely freed
at program end but rather freed at _exit about 1 nanosecond later
are regarded a leak with MEM_DEBUG, so explicitely free it.  Blaeh :-/

code4game/tinycc,avih/tinycc,code4game/tinycc,andreiw/tinycc,andreiw/tinycc,run4flat/tinycc,mingodad/tinycc,run4flat/tinycc,run4flat/tinycc,run4flat/tinycc,andreiw/tinycc,avih/tinycc,run4flat/tinycc,mirror/tinycc,mingodad/tinycc,mirror/tinycc,avih/tinycc,mingodad/tinycc,mingodad/tinycc,code4game/tinycc,avih/tinycc,mirror/tinycc,mirror/tinycc