[perl #128837] #126041 preserve systemroot env var during env wipefor Win32 in magic.t

# New Ticket Created by  bulk88 
# Please include the string:  [perl #128837]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=128837 >


This is a bug report for perl from bulk88@hotmail.com,
generated with the help of perlbug 1.40 running under perl 5.23.4.


-----------------------------------------------------------------
[Please describe your issue here]

See attached patch.

[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=core
    severity=low
---
Site configuration information for perl 5.23.4:

Configured by Owner at Thu Oct  1 07:03:10 2015.

Summary of my perl5 (revision 5 version 23 subversion 4) configuration:
  Derived from: 8c763bac457cf183bba63ecccf78664ee81f0cf8
  Platform:
    osname=MSWin32, osvers=5.1, archname=MSWin32-x86-multi-thread
    uname=''
    config_args=''
    hint=recommended, useposix=true, d_sigaction=undef
    useithreads=define, usemultiplicity=define
    use64bitint=undef, use64bitall=undef, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cl', ccflags ='-nologo -GF -W3 -Od -MD -Zi -DDEBUGGING -DWIN32 
-D_CONSOLE -DNO_STRICT  -DPERL_TEXTMODE_SCRIPTS -DNO_HASH_SEED 
-DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -D_USE_32BIT_TIME_T',
    optimize='-Od -MD -Zi -DDEBUGGING',
    cppflags='-DWIN32'
    ccversion='13.10.6030', gccversion='', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234, 
doublekind=3
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=8, 
longdblkind=0
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='__int64', 
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='link', ldflags ='-nologo -nodefaultlib -debug        
 -libpath:"c:\perl521\lib\CORE"         -machine:x86'
    libpth=\lib
    libs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib 
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib 
netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib 
odbc32.lib odbccp32.lib comctl32.lib msvcrt.lib
    perllibs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib 
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib 
netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib 
odbc32.lib odbccp32.lib comctl32.lib msvcrt.lib
    libc=msvcrt.lib, so=dll, useshrplib=true, libperl=perl523.lib
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -debug        
 -libpath:"c:\perl521\lib\CORE"         -machine:x86'

Locally applied patches:
    uncommitted-changes

---
@INC for perl 5.23.4:
    C:/perl521/site/lib
    C:/perl521/lib
    .

---
Environment for perl 5.23.4:
    HOME (unset)
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=C:\perl521\bin;C:\Program Files\Microsoft Visual Studio .NET 
2003\Common7\IDE;C:\Program Files\Microsoft Visual Studio .NET 
2003\VC7\BIN;C:\Program Files\Microsoft Visual Studio .NET 
2003\Common7\Tools;C:\Program Files\Microsoft Visual Studio .NET 
2003\Common7\Tools\bin\prerelease;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\wbem;
    PERL_BADLANG (unset)
    SHELL (unset)

• [perl #128837] #126041 preserve systemroot env var during env wipefor Win32 in magic.t by Father Chrysostomos via RT
• [perl #128837] #126041 preserve systemroot env var during env wipefor Win32 in magic.t by James E Keenan via RT
• [perl #128837] #126041 preserve systemroot env var during env wipefor Win32 in magic.t by bulk88