Fix missing fclose()
Fix missing fclose()

This typo leaked a file descriptor on each exec() call. It could cause
sqlite3 to fail with "unable to open database file" when it couldn't
open the journal.

JosuaKrause/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip,ViDA-NYU/reprozip,JosuaKrause/reprozip