[bug #62398] .../troff/input.cpp: argument "len" is zero in "new unsigned char[len]"

[Bjarni Ingi Gislason]

Follow-up Comment #3, bug #62398 (project groff):

  The "new" operator (with len = 0) creates a pointer that points to a
"NULL" (nullptr) in the memory.

  This can be seen when output is inserted to the code, for example

if (len = 0) {
    fprintf(stderr, "%s %s:%d allocated size = %d, base = %p; string = %s\n",
                    "warning:", __FILE__, __LINE__, len, base, s);
} 

  Thus this is a superfluous creation of pointers.



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