Comment 10 for bug 1905159

There are some warnings from gcc 8.3.0 (and above) on biRecord.c and on boRecord.c similar to this one (from 3.15 branch):

../../../src/std/rec/biRecord.c: In function ‘get_enum_str’:
../../../src/std/rec/biRecord.c:165:35: warning: argument to ‘sizeof’ in ‘strncpy’ call is the same expression as the source; did you mean to use the size of the destination? [-Wsizeof-pointer-memaccess]
  strncpy(pstring,prec->znam,sizeof(prec->znam));

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I think it looks a place where a problem could occur if the size of znam is greater than pstring. If we are sure this is not an issue, we could solve the warning using a fixed length (on the biRecord and boRecord case, znam and onam have length 26).
On that case, could make sense to have a constant for onam, znam (and others similar) length.

Does it make sense?
Any other suggestion ?