Bug 611850  - fix coverity Defect Type: Error handling issues
    
    https://bugzilla.redhat.com/show_bug.cgi?id=611850
    Resolves: bug 611850
    Bug Description: fix coverity Defect Type: Error handling issues
    Reviewed by: nhosoi (Thanks!)
    Branch: HEAD
    Fix Description: Check the error return from the functions.  In some cases,
    I was able to figure out that the calling function should perform additional
    error handling (return early, goto error label), but in general the code
    just logs an appropriate error message and continues.  I was able to get
    rid of some more libacl code.  I removed an unused variable from modify.c
    Platforms tested: RHEL5 x86_64
    Flag Day: no
    Doc impact: no