clang warnings on windows

[edwardhartnett]

D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:200:13: warning: absolute value function 'abs' given an argument of type 'long long' but has parameter of type 'int' which may cause truncation of value [-Wabsolute-value]
200 | itemp = abs(ipdtmpl[iutpos + 1]) * iunit;
| ^
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:200:13: note: use function 'llabs' instead
200 | itemp = abs(ipdtmpl[iutpos + 1]) * iunit;
| ^~~
| llabs
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:220:18: warning: absolute value function 'abs' given an argument of type 'long long' but has parameter of type 'int' which may cause truncation of value [-Wabsolute-value]
220 | itemp2 = abs(ipdtmpl[iutpos2]) * iunit2;
| ^
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:220:18: note: use function 'llabs' instead
220 | itemp2 = abs(ipdtmpl[iutpos2]) * iunit2;
| ^~~
| llabs
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:660:59: warning: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned long long') [-Wformat]
660 | fprintf(f, " GRIB MESSAGE %ld starts at %ld\n", msg->msg_num + 1, msg->bytes_to_msg + 1);
| ~~~ ^~~~~~~~~~~~~~~~
| %zu
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:660:77: warning: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned long long') [-Wformat]
660 | fprintf(f, " GRIB MESSAGE %ld starts at %ld\n", msg->msg_num + 1, msg->bytes_to_msg + 1);
| ~~~ ^~~~~~~~~~~~~~~~~~~~~
| %zu
D:/a/NCEPLIBS-g2c/NCEPLIBS-g2c/g2c/src/g2cdegrib2.c:662:65: warning: format specifies type 'long' but the argument has type 'size_t' (aka 'unsigned long long') [-Wformat]

662 | fprintf(f, " SECTION 0: %d 2 %ld\n", msg->discipline, msg->bytes_in_msg);

  |                                        ~~~                      ^~~~~~~~~~~~~~~~~

  |                                        %zu