Replace a call to 'alloca', thus avoiding an error when compiling on freebsd/alpha with -ansi (and on some non-fbsd platforms).  This change can only affect the access checking of 'lpr -r'.
Replace a call to 'alloca', thus avoiding an error when compiling on
freebsd/alpha with -ansi (and on some non-fbsd platforms).  This change
can only affect the access checking of 'lpr -r'.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase