[PATCH] some fixes for -Wall -Werror

[Bob Ham]

Hi,

Attached are all the fixes I got through before a gcc ICE stopped me.  There
is a cast from char * to const char * in ugids-verify-auth.c which strikes
me as not a good thing but it would need a (new?) const char type for the
password_check_user and password_check_group interfaces and this is beyond
my proto-skills.

Bob

Wall-Werror-fixes.diff
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