tools/tiffcp.c:1001: error: Integer Overflow L2
  ([0, `imagewidth`] - 1):unsigned32.

tools/tiffcp.c:980:1: <LHS trace>
978.  * Contig -> separate by row.
979.  */
980. DECLAREcpFunc(cpContig2SeparateByRow)
     ^
981. {
982. 	tdata_t inbuf = _TIFFmalloc(TIFFScanlineSize(in));

tools/tiffcp.c:980:1: Parameter `imagewidth`
978.  * Contig -> separate by row.
979.  */
980. DECLAREcpFunc(cpContig2SeparateByRow)
     ^
981. {
982. 	tdata_t inbuf = _TIFFmalloc(TIFFScanlineSize(in));

tools/tiffcp.c:1001:9: Assignment
 999. 			inp = ((uint8*)inbuf) + s;
1000. 			outp = (uint8*)outbuf;
1001. 			for (n = imagewidth; n-- > 0;) {
              ^
1002. 				*outp++ = *inp;
1003. 				inp += spp;

tools/tiffcp.c:1001:25: Binary operation: ([0, imagewidth] - 1):unsigned32
 999. 			inp = ((uint8*)inbuf) + s;
1000. 			outp = (uint8*)outbuf;
1001. 			for (n = imagewidth; n-- > 0;) {
                              ^
1002. 				*outp++ = *inp;
1003. 				inp += spp;
