* server-src/amcheck.c: Check return value of fdopen,
  fclose(dev_outf).
* server-src/driver.c, server-src/planner.c: Check return value of
  holding_file_get_dumpfile.


git-svn-id: https://svn.code.sf.net/p/amanda/code/amanda/branches/3_3@5496 a8d146d6-cc15-0410-8900-af154a0219e0