examples: Initialize char arrays

examples: Initialize char arrays

"Error: UNINIT (CWE-457):
samba-4.20.0rc2/examples/libsmbclient/testacl3.c:15: var_decl: Declaring variable ""value"" without initializer.
samba-4.20.0rc2/examples/libsmbclient/testacl3.c:55: uninit_use_in_call: Using uninitialized value ""*value"" as argument to ""%s"" when calling ""printf"". [Note: The source code implementation of the function has been overridden by a builtin model.]
   53|   		}
   54|
   55|-> 		printf(""Attributes for [%s] are:\n%s\n"", path, value);
   56|   	}
   57|"

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Noel Power <npower@samba.org>