Coverity Fixes (Part 5)
    
    11784 - Deference before null check (uiduniq/uid.c)
    11785 - Deference before null check (conntable.c)
    11786 - Deference before null check (opshared.c)
    11787 - Deference before null check (tools/dbscan.c)
    11788 - Deference before null check (tools/dbscan.c)
    11789 - Deference before null check (tools/dbscan.c)
    11790 - Allocation size mismatch (idl.c)
    11791 - Allocation size mismatch (idl.c)
    11792 - Wrong sizeof argument (dna.c)
    11793 - Stray semicolon (lib/base/util.c)
    11794 - Stray semicolon (lib/base/util.c)
    11795 - Destination buffer too small (log.c)
    11809 - Use after free (repl5_mtnode_ext.c)
    11849 - Unitialized sclara variable (dblayer.c)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=970221
    
    Reviewed by: richm(Thanks!!)
    (cherry picked from commit 6d23891a44fd41aa0580cdc223667f0ca2b9e1cc)
    (cherry picked from commit 9ac276a838636326811284a28695c0fdea4a8d03)