Warning Messages during build

[Mark Whitelaw]

On SCO OpenServer 5.0.2 with SCO Development kit, during the make of samba
the following warnings are displayed can anyone shed any light ?

BUILD MESSAGES:
===============
"smbd/open.c", line 620: warning: integer overflow detected :op "<<"

"lib/utils.c ", line 2600: warning: integer overflow detected :op "<<"
"lib/utils.c ", line 2613: warning: integer overflow detected :op "<<"