[perl #74750] fix long int cast warning in toke.c "Deprecated character" warn

# New Ticket Created by  Richard Soderberg 
# Please include the string:  [perl #74750]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=74750 >


commit e201a6b870e790ea5550be3cf4dc3c0b4505c406
Author: Richard Soderberg <rs@topsy.com>
Date:   Wed Apr 28 14:30:02 2010 -0700

    fix compilation warning on 64-bit centos 5.2 gcc 4.1.2-42.

    subtracting two char* pointers returns a ptr_diff_t which is "long int",
    but sv.c:Perl_sv_vcatpvfn:tryasterisk says va_arg(*args, int),
    so explicitly cast the ptr_diff_t to int to silence the warning.

patch vs. blead 316e9929be27149b8ce6038c5882d214010922b5 with ./Configure
-des -Dusedevel

perl -V:

Summary of my perl5 (revision 5 version 13 subversion 0) configuration:
  Platform:
    osname=linux, osvers=2.6.18-92.1.22.el5, archname=x86_64-linux
    uname='linux 2.6.18-92.1.22.el5 #1 smp tue dec 16 11:57:43 est 2008
x86_64 x86_64 x86_64 gnulinux '
    config_args='-des -Dusedevel'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=undef, usemultiplicity=undef
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2',
    cppflags='-fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include'
    ccversion='', gccversion='4.1.2 20071124 (Red Hat 4.1.2-42)',
gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib /lib64 /usr/lib64 /usr/local/lib64
    libs=-lnsl -lgdbm -ldl -lm -lcrypt -lutil -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
    libc=/lib/libc-2.5.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.5'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib
-fstack-protector'

Characteristics of this binary (from libperl):
  Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
PERL_USE_DEVEL
                        USE_64_BIT_ALL USE_64_BIT_INT USE_LARGE_FILES
                        USE_PERLIO USE_PERL_ATOF

 - R.

• [perl #74750] fix long int cast warning in toke.c "Deprecated character" warn by Richard Soderberg
• Re: [perl #74750] fix long int cast warning in toke.c "Deprecated character" warn by Nicholas Clark