* src/useradd.c: Added missing declaration of Mflg.

* src/pwck.c: Only unlock files if they were locked before (e.g.
	not in read-only mode).
	* src/pwck.c: Quote the username in error messages (harmonization
	with other messages).
	* libmisc/find_new_gid.c: Fixed typo (s/grp->gr_gid/group_id/).
	* libmisc/find_new_gid.c: Likewise.

src/useradd.c

@@ -135,6 +135,7 @@ static bool
     kflg = false,		/* specify a directory to fill new user directory */
     lflg = false,		/* do not add user to lastlog/faillog databases */
     mflg = false,		/* create user's home directory if it doesn't exist */
+    Mflg = false,		/* do not create user's home directory even if CREATE_HOME is set */
     Nflg = false,		/* do not create a group having the same name as the user, but add the user to def_group (or the group specified with -g) */
     oflg = false,		/* permit non-unique user ID to be specified with -u */
     rflg = false,		/* create a system account */